With this deprecation emitted by the compiler some codebases that
support many old Swift versions have been forced into warnings they
cannot avoid due to the compatibility promises they made.
This removes the warning but changes no functionality.
The latter example NIODefaultSerialEventLoopExecutor when the type is
more available than the enqueue implementation provided via an
extrension would issue a warning that that this enqueue(ExecutorJob)
would not be used which is not true.
We need to filter out all "default impls" from the stdlib as we issue
this warning.
We also put a note on the offending declaration that one can remove now,
to ease getting rid of warnings when possible
Resolves rdar://115166475
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.
