This means that:
1. In test cases where minimal is the default (swift 5 without
-warn-concurrency), I added RUN lines for targeted, complete, and complete +
sns.
2. In test cases where complete is the default (swift 6, -warn-concurrency,
specified complete with -strict-concurrency), I added a send non-sendable run
line.
In each of these cases, I added additional expected-* lines as appropriate so
the tests can compile in each mode successfully.
This eliminates spurious warnings suggesting that folks remove
`@preconcurrency` from imports that occur during `-emit-module` phases,
because we're skipping function bodies and, therefore, the code that
would depend on the `@preconcurrency` import.
Fixes https://github.com/apple/swift/issues/58183 / rdar://89940926.
