KMS-570: Merge CDK integration branch into main.

[cgokey]

Overview

What is the feature?

Replace serverless framework with CDK.

What is the Solution?

Update codebase and replace serverless framework with CDK.
Update bamboo to deploy CDK instead of serverless infrastructure.

What areas of the application does this impact?

Deployments
Lambdas

Testing

We should do some fairly significant testing of this integration branch to ensure everything is working as expected.

Checklist

• I have added automated tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.57%. Comparing base (e477379) to head (d9a2aba).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #78      +/-   ##
==========================================
- Coverage   99.59%   99.57%   -0.03%     
==========================================
  Files         143      139       -4     
  Lines        2457     2333     -124     
  Branches      591      571      -20     
==========================================
- Hits         2447     2323     -124     
  Misses          9        9              
  Partials        1        1              

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