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

[Vy Nguyen via llvm-commits]

oontvoo wrote:

> Writing to a user-specified file is not a security risk. It only becomes a security risk if that file is somehow automatically > > gathered/sent somewhere, which is beyond the scope of this project

We  definitely have different privacy and security models in mind here.
You may or may not agree, but to us, the fact that data is redirected to a location with non-auditable access (ie., a local file) *is* a problem.  Regardless, this goes back to my point that it is near impossible to accommodate all different models, which is why I'm proposing we opt-out of implementing a concrete class. 


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