fix: ensure all post steps are executed

[KnisterPeter]

This fixes an issue in the chain of post steps introduced
while updating the step-logger for composite actions.

It includes a test case so we make sure this does not happen
again.

[github-actions]

MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ CREDENTIALS	secretlint	yes		no	0.95s
✅ EDITORCONFIG	editorconfig-checker	2		0	0.01s
✅ GIT	git_diff	yes		no	0.0s

See errors details in artifact MegaLinter reports on CI Job page
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

[codecov]

Codecov Report

Merging #1286 (b489380) into master (4f8da0a) will increase coverage by 4.16%.
The diff coverage is 74.46%.

@@            Coverage Diff             @@
##           master    #1286      +/-   ##
==========================================
+ Coverage   57.50%   61.67%   +4.16%     
==========================================
  Files          32       40       +8     
  Lines        4594     5529     +935     
==========================================
+ Hits         2642     3410     +768     
- Misses       1729     1848     +119     
- Partials      223      271      +48     

Impacted Files	Coverage Δ
pkg/model/action.go	0.00% <0.00%> (ø)
pkg/model/step_result.go	0.00% <ø> (ø)
pkg/container/docker_run.go	14.03% <16.07%> (+8.49%)	⬆️
pkg/container/docker_pull.go	33.33% <33.33%> (ø)
pkg/container/file_collector.go	45.87% <45.87%> (ø)
pkg/common/git/git.go	50.00% <47.91%> (ø)
pkg/container/docker_auth.go	47.61% <50.00%> (+2.61%)	⬆️
pkg/model/workflow.go	54.32% <50.00%> (+3.40%)	⬆️
pkg/exprparser/interpreter.go	73.37% <53.48%> (-0.02%)	⬇️
pkg/model/planner.go	50.73% <60.00%> (+0.32%)	⬆️
... and 30 more

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