Add support for libfmt-11

This is a minor improvement to add line numbers to the LOG_VULKAN_ERROR
define. Basically error logs for Vulkan will now look like:

```
// This
25:03:347 VideoBackends/Vulkan/VulkanLoader.cpp:247 E[Video]: (WaitForCommandBufferCompletion:278) vkWaitForFences failed:  (2: VK_TIMEOUT)

// Instead of
15:45:154 VideoBackends/Vulkan/VulkanLoader.cpp:247 E[Video]: (WaitForCommandBufferCompletion) vkWaitForFences failed:  (2: VK_TIMEOUT)
```

fmt::join was moved into fmt/ranges.h

Signed-off-by: Alfred Wingate <parona@protonmail.com>

Things using dolphin_find_optional_system_library need to link against the name used there or they won't work with both the system and bundled cases

VideoCommon: More specific subgroup op bugs

Now only VertexLoader remains... But that one might be tricky.

To ensure memory safety, callers of GetPointer have to perform a bounds
check. But how is this bounds check supposed to be performed?
GetPointerForRange contained one implementation of a bounds check, but
it was cumbersome, and it also isn't obvious why it's correct.

To make doing the right thing easier, this commit changes GetPointer to
return a span that tells the caller how many bytes it's allowed to
access.