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

[James Henderson via llvm-commits]

jh7370 wrote:

> Hi @jh7370 , just wonder if you're back and have time to look at this again?

Sorry, I've been back for a week or so, but have had other higher priority tasks to tackle in the meantime. I hope to have enough time tomorrow or Monday, but can't promise anything.

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