[llvm] [GlobalISel] Change MatchTable entries to 1 byte each (PR #74429)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

> Breaks https://lab.llvm.org/buildbot/#/builders/5/builds/39231/steps/9/logs/stdio Could you please fix or revert

Bot should be fixed with eabf7ec3f3d4688ea0f9da24038462362837d7ff

BTW. Does it need to take into account `llvm::endian`?

https://github.com/llvm/llvm-project/pull/74429