Change PTransformOverride.get_matcher() to PTransformOverride.matches(AppliedTransform)

This will simplify the interface.

PTransformOverride.matches() should be a efficient check to  determine if a given transform should be replaced while PTransformOverride.get_replacement_transform() should generate and return the actual replacement.

Imported from Jira [BEAM-3614](https://issues.apache.org/jira/browse/BEAM-3614). Original Jira may contain additional context.
Reported by: chamikara.

Start by locating the PTransformOverride interface and all uses of get_matcher(), matches(), and get_replacement_transform(). Review the linked BEAM-3614 Jira issue for additional context. Done means the interface uses matches(AppliedTransform) for efficient eligibility checks and get_replacement_transform() creates the replacement transform.

Written by the indexing model from the issue text.