feat: add custom actions execution modes to inspect executionModes list

[renzodavid9]

Related: #8609

Description
This PR extend the inspect executionModes list command to include the information detected in the customActions stanza.

[codecov]

Codecov Report

Merging #8697 (70d3630) into main (290280e) will decrease coverage by 5.99%.
The diff coverage is 54.27%.

@@            Coverage Diff             @@
##             main    #8697      +/-   ##
==========================================
- Coverage   70.48%   64.50%   -5.99%     
==========================================
  Files         515      615     +100     
  Lines       23150    31003    +7853     
==========================================
+ Hits        16317    19997    +3680     
- Misses       5776     9507    +3731     
- Partials     1057     1499     +442     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/completion.go	13.04% <0.00%> (-1.25%)	⬇️
cmd/skaffold/app/cmd/config/list.go	65.21% <ø> (ø)
cmd/skaffold/app/cmd/config/set.go	88.72% <ø> (ø)
cmd/skaffold/app/cmd/config/util.go	54.28% <ø> (ø)
cmd/skaffold/app/cmd/credits.go	100.00% <ø> (ø)
cmd/skaffold/app/cmd/credits/export.go	0.00% <0.00%> (ø)
cmd/skaffold/app/cmd/deploy.go	40.90% <0.00%> (-12.94%)	⬇️
cmd/skaffold/app/cmd/generate_pipeline.go	60.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_modules.go	65.00% <ø> (ø)
cmd/skaffold/app/cmd/inspect_profiles.go	66.66% <ø> (ø)
... and 39 more

... and 406 files with indirect coverage changes

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[aaron-prindle]

LGTM!