fix: mock handles and prints child proc errors

[edwardfoyle]

Issue #, if available:
#6311, #6461, #5869

Description of changes:
Ensure stdout and stderr of all mock executors is connected to stdout and stderr or the parent process so that output is printed to the terminal

Also significantly refactored node executor to make the code easier to reason about as well as handle errors in a more robust way

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

[lgtm-com]

This pull request fixes 3 alerts when merging 7f66c08 into 31eb8eb - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[jhockett]

LGTM

[lgtm-com]

This pull request fixes 3 alerts when merging f7d4653 into 31eb8eb - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[lgtm-com]

This pull request fixes 3 alerts when merging d2fa945 into 31eb8eb - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[codecov]

Codecov Report

Merging #6601 (31eb8eb) into master (819a749) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #6601      +/-   ##
==========================================
+ Coverage   56.93%   56.96%   +0.02%     
==========================================
  Files         484      484              
  Lines       21904    21915      +11     
  Branches     4373     4377       +4     
==========================================
+ Hits        12472    12484      +12     
+ Misses       8551     8550       -1     
  Partials      881      881              

Impacted Files	Coverage Δ
...amplify-cli-core/src/state-manager/stateManager.ts	45.16% <100.00%> (ø)
packages/amplify-cli-core/src/tags/Tags.ts	90.00% <100.00%> (+11.05%)	⬆️

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[lgtm-com]

This pull request fixes 3 alerts when merging 2fe77d5 into 31eb8eb - view on LGTM.com

fixed alerts:

• 3 for Unused variable, import, function or class

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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