[clang-tools-extra] [clang-tidy] Ignore unevaluated context in bugprone-optional-value-conversion (PR #90410)

[Julian Schmidt via cfe-commits]

5chmidti wrote:

> And in example that you provided there is no issue.

Alright, at least not a bugrprone issue. And the argument for a readability issue (which is the direction I initially was going) would probably end in someone saying `we use this to diagnose compile errors earlier, not deeper in any instantiations`

https://github.com/llvm/llvm-project/pull/90410