[6.4.x] SymbolGraphGen: Expand anyAppleOS availability in symbol graphs#88957

tshortli merged 3 commits intoswiftlang:release/6.4.xswiftlang/swift:release/6.4.xfrom

tshortli:expand-any-apple-os-in-symbol-graphs-6.4.xtshortli/swift:expand-any-apple-os-in-symbol-graphs-6.4.xCopy head branch name to clipboard