swift

18809358 - [Concurrency] Avoid Sendable checking for conversions that strip `@Sendable` from `nonisolated(nonsending)` function type

[Concurrency] Avoid Sendable checking for conversions that strip `@Sendable` from `nonisolated(nonsending)` function type The isolation doesn't change in this cause and making function type non-Sendable means that it woun't be able to leave the current concurrency domain and the compiler won't generate a thunk. (cherry picked from commit 40c9674dfde44e7d048a14455ff3b3f6521a2dc4)