Fix for getting execution errors from the CLI

[lcampos]

What does this PR do?

Makes sure we return error info from a CLI execution. Old versions of the CLI used to return error info in stdError but newer versions return it in stdOut.

What issues does this PR fix or reference?

@W-7287990@, #2160 , #2005

[codecov]

Codecov Report

Merging #2216 into develop will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2216      +/-   ##
===========================================
- Coverage    74.06%   74.05%   -0.02%     
===========================================
  Files          234      234              
  Lines         8800     8800              
  Branches       986      986              
===========================================
- Hits          6518     6517       -1     
  Misses        2036     2036              
- Partials       246      247       +1     

Impacted Files	Coverage Δ
...forcedx-vscode-core/src/channels/channelService.ts	83.72% <0.00%> (-2.33%)	⬇️

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[xyc]

Would be great to have some test changes accompanying this change