Minor Clang diagnostic improvements#10659

Merged

cyndyishida merged 3 commits intoswiftlang:swift/release/6.2from

cyndyishida:eng/PR-clangFrontendDiags

May 13, 2025

Commits on May 12, 2025

[clang][Modules] Clarify error message when size check fails in lookupModuleFile
cyndyishida
committed
[clang] Remove "unknown" from availability diags (#138610)
cyndyishida
committed
[Support] Avoid setting minor/subminor/build in VersionTuple::withMajorReplaced (#139318)
cyndyishida
committed