refactor(event_handler): match to match_results; 3.10 new keyword

[michaelbrewer]

Issue #, if available:

Description of changes:

• Rename match to match_results
• fix Docstrings for optionals.

Checklist

• Meet tenets criteria
• Update tests
• Update docs
• PR title follows conventional commit semantics

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-commenter]

Codecov Report

Merging #616 (6825fbc) into develop (25f067a) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #616   +/-   ##
========================================
  Coverage    99.95%   99.95%           
========================================
  Files          114      114           
  Lines         4581     4581           
  Branches       249      249           
========================================
  Hits          4579     4579           
  Partials         2        2           

Impacted Files	Coverage Δ
...utilities/data_classes/appsync_authorizer_event.py	100.00% <ø> (ø)
aws_lambda_powertools/event_handler/api_gateway.py	100.00% <100.00%> (ø)

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