Add `patched()` and `deprecatePatch()` APIs

[mjameswh]

Describe the solution you'd like

In short:

• Add the boolean Workflow.patched(String patchId, boolean memoized) and Workflow.deprecatePatch(String patchId, boolean memoized) APIs. Refer to Core's implementation (once it is ready).

• (Maybe) Deprecate the GetVersion API.

See temporalio/features#591 for details.