refactor(cli): hotswap is now a deployment method

[mrgrain]

Follow-up from #517 to make the same changes to the CLI. This has no user impact.

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[mrgrain]

this is now handled in cli.ts

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 6.25000% with 60 lines in your changes missing coverage. Please review.

Project coverage is 78.72%. Comparing base (0145866) to head (9a89317).

Files with missing lines	Patch %	Lines
packages/aws-cdk/lib/cli/cli.ts	3.22%	60 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #519      +/-   ##
==========================================
- Coverage   78.92%   78.72%   -0.21%     
==========================================
  Files          46       46              
  Lines        6980     6974       -6     
  Branches      777      772       -5     
==========================================
- Hits         5509     5490      -19     
- Misses       1452     1465      +13     
  Partials       19       19              

Flag	Coverage Δ
suite.unit	78.72% <6.25%> (-0.21%)	⬇️

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