This is a continuation of 552b6da. That commit hid sys/boot.bin, but not
disc/header.bin, which is only present for Wii games.

Fixes https://bugs.dolphin-emu.org/issues/13810.

DiscIO: Pass parameters by constant reference

Hide DirectoryBlob boot.bin files from game list

Extracted games contain a boot.bin file that contains the disc header.
These boot.bin files are considered valid volumes by Dolphin, since
Dolphin only checks the disc header to determine if something is a valid
GC/Wii disc. Running them doesn't make any sense, though.

boot.bin files used to not be scanned by Dolphin due to their file
extension, but .bin was added to the list of file extensions to scan for
in 494e2c0. To stop them from showing up in the game list, let's update
the ShouldHideFromGameList mechanism.

find ./Source/ -name '*.cpp' -o -name '*.h' | xargs clang-format-19 -i

DiscIO: Remove redundant qualifiers