Cherry-pick fix for crash in ASTWriter / Bad construction of ConceptSpecializationExpr to 16.0.1 branch

[yeswalrus]

Initial discovery: #61486
Resolved in https://reviews.llvm.org/D146678 / https://reviews.llvm.org/rG1f48a1fce23551cc24f5b598af5994f5cfc6b6d0

This has been present since at least clang 15, and was present in 16.0.0, and the fix should be cherry-picked to the clang 16.0.1 branch.

I don't appear to have permissions to add this to the milestone directly

[yeswalrus]

/cherry-pick 1f48a1f

[yeswalrus]

@erichkeane I believe this is the issue you asked for - I appear to be unable to add to the 16.0.1 milestone myself

[erichkeane]

Done.

[llvmbot]

/branch llvm/llvm-project-release-prs/issue61801

[llvmbot]

/pull-request llvm/llvm-project-release-prs#399

[llvmbot]

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