[llvm] [llvm]Add a simple Telemetry framework (PR #102323)

[Pavel Labath via llvm-commits]

https://github.com/labath commented:

I made a pass over the patch. It's not my intention to reopen any issue that has already been discussed, so if anything I say contradicts what was already agreed upon, let me know.

https://github.com/llvm/llvm-project/pull/102323