refactor(cli): use IoHelper in internal APIs

[mrgrain]

This PR is a lot. There is no good way of reviewing it, so thanks for taking the time.

The main change here is the usage of the IoHelper in all internal APIs. Previously we would pass an IoHost and an action around as pair, but separate value. Instead we now use the IoHelper which knows how to send messages with an action.

I also decided to rename all properties and params respectively. This is partly what makes the PR so large. Note that all changes are to private APIs.

---

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

[mrgrain]

ioHost.currentAction is extending ToolkitAction with additional values. This is fine.
Same again in L189

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 85.11327% with 46 lines in your changes missing coverage. Please review.

Project coverage is 85.26%. Comparing base (da515f4) to head (c6d756a).

Files with missing lines	Patch %	Lines
...ages/aws-cdk/lib/api/deployments/cloudformation.ts	67.85%	9 Missing ⚠️
...ckages/aws-cdk/lib/api/resource-import/importer.ts	57.14%	6 Missing ⚠️
...ckages/aws-cdk/lib/api/deployments/deploy-stack.ts	90.19%	5 Missing ⚠️
...s-cdk/lib/api/environment/environment-resources.ts	63.63%	4 Missing ⚠️
...dk/lib/api/garbage-collection/garbage-collector.ts	89.74%	4 Missing ⚠️
...ckages/aws-cdk/lib/api/resource-import/migrator.ts	55.55%	4 Missing ⚠️
packages/aws-cdk/lib/api/deployments/assets.ts	66.66%	3 Missing ⚠️
...ackages/aws-cdk/lib/api/deployments/deployments.ts	85.00%	3 Missing ⚠️
packages/aws-cdk/lib/cli/cdk-toolkit.ts	75.00%	3 Missing ⚠️
...cdk/lib/api/stack-events/stack-activity-monitor.ts	80.00%	2 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #209      +/-   ##
==========================================
+ Coverage   85.04%   85.26%   +0.22%     
==========================================
  Files         208      208              
  Lines       35786    35710      -76     
  Branches     4633     4652      +19     
==========================================
+ Hits        30435    30449      +14     
+ Misses       5200     5111      -89     
+ Partials      151      150       -1     

Flag	Coverage Δ
suite.unit	85.26% <85.11%> (+0.22%)	⬆️

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[mrgrain]

deleted since this test was just testing that the CI dependent stream selection works.

[kaizencc]

seems like a big refactor, but there are no additional things you're sliding in and if the tests pass, i trust you...

[mrgrain]

Added pr/exempt-integ-test because both failing integ tests are external issues.