[5.9] Companion of cherry-picking multiple SwiftSyntax PRs to `release/5.9`#514

Merged

ahoppen merged 2 commits intoswiftlang:release/5.9from

ahoppen:ahoppen/5.9/cherry-pick-2

Apr 22, 2023

Commits on Apr 18, 2023

Remove usages of functions that shouldn’t be part of SwiftSyntax’s public API
ahoppen
committed
Adjustment for SwiftSyntax rename `members` -> `memberBlock`
ahoppen
committed