Unfinished handlers: add rule and test CAN, dynamic, and late-registered handlers

[dandavison]

Closes https://github.com/temporalio/sdk-python/issues/584

• Add the [TMPR1102] rule tag to the warning messages
• Add tests confirming that the all_handlers_finished and warnings logic work for continue-as-new, dynamic handlers, and late-registered handlers.
• Refactor all tests as a pytest.mark.parametrize Cartesian product