[llvm-branch-commits] [clang] [Serialization] Code cleanups and polish 83233 (PR #83237)

[Alexander Kornienko via llvm-branch-commits]

alexfh wrote:

> bool operator==(const LazySpecializationInfo &Other)

Making this `operator==` `const` helps with the warning in C++20. And it's the right thing to do anyway.

https://github.com/llvm/llvm-project/pull/83237