[clang] [clang][ExprConst] Add another missing `NoteLValueLocation()` call (PR #195098)

[Eli Friedman via cfe-commits]

https://github.com/efriedma-quic approved this pull request.

Oh, I think I misread some of the diagnostics; the note isn't attached to the warning on the same line. Maybe consider using a marker to move the note next to the corresponding diagnostic?

Otherwise LGTM

https://github.com/llvm/llvm-project/pull/195098