Feature: New API to capture Client Information for telemetry

[cheenamalhotra]

With reference to request coming from EF Core team (dotnet/efcore#35730), opening this issue for tracking feature introduction in the SqlClient repo.

[SamMonoRT]

@cheenamalhotra - are we on track on this one to be completed by end of month? I want to make sure I can prioritize EF side of changes as soon as this is completed.

[paulmedynski]

We're planning to get the plumbing in place with some internal-to-MDS data flowing for the 6.1 release. We have a proposal for a public API that apps or middleware could use add some basic info to this feed, but we need to do some PII/privacy/legal reviews first, so it likely won't make it into 6.1.