fix(lib/es2015): Move Promise.race(Iterable) to es2015.iterable.d.ts

[ExE-Boss]

#31117 caused an issue where the Promise.race overload that takes an Iterable argument was in es2015.promise.d.ts instead of being in es2015.iterable.d.ts.

---

Fixes #31722
Supersedes and closes #36368

[falsandtru]

See #36368

[falsandtru]

Note that this PR has the following unapproved change:

-    all<TAll>(values: Iterable<TAll | PromiseLike<TAll>>): Promise<TAll[]>;
+    all<T>(values: Iterable<T>): Promise<(T extends PromiseLike<infer U> ? U : T)[]>;

#36368 is the conservative original PR.

[rbuckton]

We are pushing awaited until after TS3.9 while we continue to assess the impact of the change. While this means we are essentially reverting #35998 with #37610, #37610 leaves in place the change that addressed this issue.