[clang] [clang][analyzer] Make per-entry-point metric rows uniquely identifiable (PR #161663)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

That sounds plausible, thanks for the answer/guess!

> I don't think I'd escalate this. Maybe if we are bitten by this again in the future.

I agree, I was just curious.

https://github.com/llvm/llvm-project/pull/161663