[JIT][write path] Fix TupleType.annotation_str to conform to `typing` module syntax for empty tuple type (#54745)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/54745
Test Plan: Imported from OSS
Reviewed By: SplitInfinity
Differential Revision: D27350332
Pulled By: jamesr66a
fbshipit-source-id: 62af3b2b53561bb8e4adbdc0aec54520e08a5bf7
