Merge `main` into `release/6.3`#9534

Draft

github-actions[bot] wants to merge 8 commits intorelease/6.3from

automerge/merge-main-2025-12-22_09-05

Commits on Dec 16, 2025

Statically linking Swift Stdlib in SwiftBuild if set (#9417)
bkhouri
authored

Commits on Dec 17, 2025

Only include the platform PrivateFrameworks directory as a runtime, not build-time, search path (#9518)
stmontgomery
authored

Commits on Dec 18, 2025

Commits on Dec 19, 2025

Commits on Dec 20, 2025

Mark tests as expected failure in a specific environment (#9525)
bkhouri
authored