Extend E2E script to allow CDK customization

[lewijacn]

Description

This change includes the following changes to allow more customization with our awsE2ESolutionSetup.sh script as well as minor bug fixes:

• Allow option to migration CDK to provide a file path for loading CDK context and add tests cases around this
• Update e2e script to load CDK context for both source and target via a provided context file
• Add clean-up-all option to e2e script for cleaning up all deployed resources after running
• Modify spots in e2e script to use absolute path from single variable instead of on-the-fly relative paths
• Bug fix around Custom Resource for getting MSK broker endpoints which still tried to retrieve these endpoints on 'Delete' lambda events

Issues Resolved

https://opensearch.atlassian.net/browse/MIGRATIONS-1690

Testing

CDK tests and manual AWS testing

Check List

• New functionality includes testing
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.55%. Comparing base (2ae2959) to head (719cab1).
Report is 46 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #651      +/-   ##
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- Coverage     75.84%   75.55%   -0.30%     
+ Complexity     1545     1541       -4     
============================================
  Files           168      168              
  Lines          6446     6455       +9     
  Branches        574      575       +1     
============================================
- Hits           4889     4877      -12     
- Misses         1177     1195      +18     
- Partials        380      383       +3     

Flag	Coverage Δ
unittests	75.55% <ø> (-0.30%)	⬇️

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[chelma]

Overall, makes sense. I have one questions but it's not a blocker.

[chelma]

Thank you for the comment!

[chelma]

No action necessarily required, just a question for you - are you having trouble with maintaining/extending/debugging this script? Have we considered migrating its functionality to something like Python, etc?

[lewijacn]

I'm 1000% onboard with migrating this script to python, so much so that I let AI take a swing at it the other day to see how well it could do with it, and with some parameters it did a decent job and might be worth looking into as a reference