Various fixes:

1. Fixed pattern_pair_aggregator to support various ways of handling
   pattern matches (remove, keep and just trigger a callback, or
   aggregate
2. Fixed ivr_navigator use of pattern_pair_aggregator
3. Test fixes -- Tests now pass

examples/foundational/35-pattern-pair-voice-switching.py

@@ -111,7 +111,7 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
         start_pattern="<voice>",
         end_pattern="</voice>",
         type="voice",
-        remove_match=True,
+        action="remove",  # Remove tags from final text
     )
 
     # Register handler for voice switching