[llvm] [llvm][Support] Add YAMLGenerateSchema for producing YAML schemas (PR #133284)

[Timur Golubovich via llvm-commits]

tgs-sc wrote:

@EugeneZelenko, hi! Sorry to bother you, but maybe you can call your friend so that they would also take a look at this patch? Or do you like everything in general?

https://github.com/llvm/llvm-project/pull/133284