[5.10] Add fixes that were present in 509.0.0 but not release/5.10

[ahoppen]

• Explanation: A few PRs were cherry-picked PRs to the 509.0.0 release of swift-format but were not cherry-picked to the release/5.10 branch. A couple other high-priority fixes were only merged into main but not into release/5.10 even though they were intended to be part of the 5.10 release. These PRs are
  • Present in 509 but not release/5.10
    • Add option to disable trailing commas on multi-line collections #619
    • [Lint] Add a rule to detect and transform [<Type>]() into literal … #617
    • [5.9 🍒] Add support for various new 5.9 features. #623
  • Fixes issues that resulted in invalid Swift code or code that changes meaning
    • Fix multi-line string wrapping in @available attributes. #656
      • Would generate invalid code for multi-line string literals in @available attributes
    • b268ae8
      • Would rewrite Optional< @Sendable (Int) -> (Float)> to @Sendable (Int) -> (Float)? which has a different semantic meaning
• Risk: The first three PRs are already part of the 509 release, so they have zero risk. The other two PRs are targeted fixes that only affect @available attributes and types prefixed with an attribute, respectively
• Testing: Ran test suite and newly added test cases
• Issue: n/a
• Reviewer: n/a

[ahoppen]

✅ Cross-repo testing from swiftlang/swift-syntax#2201 passed.

[allevato]

Thanks!