fix(cli): hotswap is reporting and running changes that don't happen

[mrgrain]

This change is three fold:

• We clean up the private HotswapOperation interface (née HotswappableChange) by removing two unused fields and adding in a new filed in preparation for structured data alongside hotswap messages
• In the hotswap providers, pull gates outside of the apply function. This prevents hotswaps being reported when nothing would actually be done. These are local checks and now just run a little bit earlier.
• In lambda-functions.ts don't report hotswappable changes for versions and aliases. These used to be reported with an empty array for resourceNames and a noop apply function. This means that literally nothing happens with these entries, since apply doesn't do anything and the CLI uses resourceNames to print anything. Just removing these as they are reported as part of a change to the function.

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[mrgrain]

Surprisingly, these were unused. propsChanged is not made available as raw data via change.

[mrgrain]

This is a class, but was never used as one. It's now an interface as it should be.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.27160% with 19 lines in your changes missing coverage. Please review.

Project coverage is 85.10%. Comparing base (cb8a7e0) to head (6eb409c).

Files with missing lines	Patch %	Lines
...ckages/aws-cdk/lib/api/hotswap/lambda-functions.ts	92.42%	5 Missing ⚠️
...s/aws-cdk/lib/api/hotswap/s3-bucket-deployments.ts	70.58%	4 Missing and 1 partial ⚠️
...s-cdk/lib/api/hotswap/appsync-mapping-templates.ts	72.72%	3 Missing ⚠️
...ges/aws-cdk/lib/api/hotswap/code-build-projects.ts	72.72%	3 Missing ⚠️
...dk/lib/api/hotswap/stepfunctions-state-machines.ts	75.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #244   +/-   ##
=======================================
  Coverage   85.09%   85.10%           
=======================================
  Files         206      206           
  Lines       35215    35197   -18     
  Branches     4535     4534    -1     
=======================================
- Hits        29966    29954   -12     
+ Misses       5099     5095    -4     
+ Partials      150      148    -2     

Flag	Coverage Δ
suite.unit	85.10% <88.27%> (+<0.01%)	⬆️

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[rix0rrr]

💅 This would be nicer with a named struct definition.

[mrgrain]

Coming up next!

[mrgrain]

Bypassing tests due to unrelated test failure.