This reverts commit e4349ae1791dec688d91c6813eeadf049a8c73ec.

The 0x prefix is included in the characters count (unlike e.g. in Rust
where there is no 0x prefix), so that commit was wrong.  Sorry about
that!

Fixes regression introduced in #14842.

Optimize vertex_shader_uid_data down to 28 bytes

This token is a u16, not a u24, so let’s not display unnecessary 00
padding.

This started as a fixing a misalignment issue, but I got carried away.
Was originally 41 bytes (overflowing it's expected 40 bytes by 1 bit).

Now it's 27 bytes plus 8 bits of padding (ready for future expansion).

The savings come from:
 - Removing UV usage from components, it can be reconstructed from
   texcoord_elem_count (saved 8 bits)
 - Removed the 8 unused bits from texMtxInfo_n_projection (saved 8 bits)
 - Removing unused bit from from start of components (saved 1 bit)
 - Removed extra bit from inputform, texgentype and sourcerow
 - packed texMtxInfo_n_projection and texcoord_elem_count back into
   the per texgen info space freed up above. (saved 24 bits)
 - Overlayed postMtx index and Emboss mode shifts into a union based on
   texgentype (saved 56 bits)
 - Move to a single-bit union tag, freeing up an extra bit for regular
   texgens.
 - Move PotMtx normalize into the freed up space (saved 8 bits)

Total savings: 105 bits of data

EDIT: Even worse, MSVC wasn't respecting pack(1) for bitfields at all,
      so on windows this struct was actually quite a bit larger.
      Something like 80 bytes, if not more.

      Fixed this by dropping the size of any enums used in these
      bit structs to u8. Our Common::BitField allows for the underlying
      type to be explicitly specified to something larger.

      msvc's bitfield packing appears to be completely braindead, can't
      mix sizes at all.

83dc468 broke the OSD message that shows the number of custom textures.
If Prefetch Custom Textures was disabled, the number would always be 0.

When using clang and libstdc++, compiling fails with these errors:

```
FAILED: [code=1] Source/Core/VideoCommon/CMakeFiles/videocommon.dir/PerformanceMetrics.cpp.o
/usr/sbin/ccache /usr/sbin/clang++ -DAUTOUPDATE=1 -DDATA_DIR=\"/usr/local/share/dolphin-emu/\" -DHAS_OPENGL -DHAS_VULKAN -DHAVE_CPPIPC -DHAVE_LIBSYSTEMD -DIMGUI_USER_CONFIG=\"imgui_user_config.h\" -DLZMA_API_STATIC -DOFF -DPUGIXML_NO_EXCEPTIONS -DRC_CLIENT_SUPPORTS_HASH -DSFML_STATIC -DSPNG_STATIC -DTINYGLTF_NOEXCEPTION -DTINYGLTF_NO_EXTERNAL_IMAGE -DTINYGLTF_USE_CPP14 -DUSE_ANALYTICS=1 -DUSE_MEMORYWATCHER=1 -DUSE_PIPES=1 -DUSE_RETRO_ACHIEVEMENTS -DZSTD_MULTITHREAD -D_ARCH_64=1 -D_DEFAULT_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_M_X86_64=1 -D__LIBUSB__ -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -I/dolphin-local/Source/Core -I/dolphin-local/Externals/picojson -I/dolphin-local/build/release/x64/Source/Core -I/dolphin-local/Externals/enet/enet/include -I/dolphin-local/Externals/fmt/fmt/include -I/dolphin-local/Externals/mbedtls/include -I/dolphin-local/Externals/minizip-ng/minizip-ng -I/dolphin-local/Externals/liblzma/api -I/dolphin-local/Externals/zstd/zstd/build/cmake/../../lib -I/dolphin-local/Externals/libiconv/include -I/dolphin-local/build/release/x64/Externals/libiconv/lib -I/dolphin-local/Externals/libiconv/libcharset/include -I/dolphin-local/build/release/x64/Externals/libiconv/libcharset -I/dolphin-local/Externals/SFML/SFML/include -I/dolphin-local/Externals/bzip2/bzip2 -I/dolphin-local/Externals/expr/include -I/dolphin-local/Externals/hidapi/hidapi-src/hidapi -I/dolphin-local/Externals/pugixml/pugixml/src -I/dolphin-local/Externals/glslang/glslang/glslang/.. -I/dolphin-local/build/release/x64/include -I/dolphin-local/Externals/rcheevos -I/dolphin-local/Externals/libspng/libspng/spng -I/dolphin-local/Externals/xxhash/xxHash -I/dolphin-local/Externals/imgui -I/dolphin-local/Externals/imgui/imgui -I/dolphin-local/Externals/implot/implot -I/dolphin-local/Externals/glslang/glslang/SPIRV/.. -I/dolphin-local/Externals/tinygltf -isystem /dolphin-local/Externals/libusb/libusb/libusb -isystem /dolphin-local/Externals/glslang/glslang -isystem /dolphin-local/Externals/glslang/glslang/Public -isystem /dolphin-local/Externals/glslang -Qunused-arguments -fcolor-diagnostics -O3 -DNDEBUG -std=c++23 -msse2 -fdiagnostics-color -fno-strict-aliasing -fno-exceptions -fvisibility-inlines-hidden -fvisibility=hidden -fomit-frame-pointer -Wall -Wtype-limits -Wsign-compare -Wignored-qualifiers -Wuninitialized -Wshadow -Wshadow-field-in-constructor -Winit-self -Wmissing-declarations-Wmissing-variable-declarations -Werror=format -Wno-trigraphs -MD -MT Source/Core/VideoCommon/CMakeFiles/videocommon.dir/PerformanceMetrics.cpp.o -MF Source/Core/VideoCommon/CMakeFiles/videocommon.dir/PerformanceMetrics.cpp.o.d -o Source/Core/VideoCommon/CMakeFiles/videocommon.dir/PerformanceMetrics.cpp.o -c /dolphin-local/Source/Core/VideoCommon/PerformanceMetrics.cpp
In file included from /dolphin-local/Source/Core/VideoCommon/PerformanceMetrics.cpp:4:
/dolphin-local/Source/Core/VideoCommon/PerformanceMetrics.h:69:51: error: no matching constructor for initialization of 'std::atomic<FrameBufferSize>'
   69 |   std::atomic<FrameBufferSize> m_frame_buffer_size{};
      |                                                   ^~
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/16/../../../../include/c++/16/atomic:237:17: note: candidate constructor not viable: constraints not satisfied
  237 |       constexpr atomic() noexcept(is_nothrow_default_constructible_v<_Tp>)
      |                 ^
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/16/../../../../include/c++/16/atomic:238:11: note: because 'is_default_constructible_v<PerformanceMetrics::FrameBufferSize>' evaluated to false
  238 |         requires is_default_constructible_v<_Tp>
      |                  ^
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/16/../../../../include/c++/16/atomic:246:7: note: candidate constructor not viable: requires 1 argument, but 0 were provided
  246 |       atomic(const atomic&) = delete;
      |       ^      ~~~~~~~~~~~~~
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/16/../../../../include/c++/16/atomic:252:17: note: candidate constructor not viable: requires single argument '__i', but no arguments were provided
  252 |       constexpr atomic(_Tp __i) noexcept : _M_i(__i)
      |                 ^      ~~~~~~~
1 error generated.
```

This was tested and occurs on both Arch and Alpine Linux.

fb4ff3e put all the code for the show internal resolution setting right
next to the code for the show FPS setting, presumably because an earlier
version of that commit had them next to each other in the GUI. It makes
more conceptual sense to put the code next to the code for the show
statistics settings, matching what the GUI looks like now.