fix: keep action inputs

[KnisterPeter]

Do not initialize inputs a second time (in pre and main step).
When the action setup already run during pre step, we must not
re-run it during the main step, otherwise the inputs will be
overwritten by possible other action inputs.

This is a regression introduced in #1204

[github-actions]

MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ CREDENTIALS	secretlint	yes		no	1.33s
✅ EDITORCONFIG	editorconfig-checker	1		0	0.01s
✅ GIT	git_diff	yes		no	0.01s

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 #1215 (7263a93) into master (4f8da0a) will increase coverage by 4.81%.
The diff coverage is 76.41%.

@@            Coverage Diff             @@
##           master    #1215      +/-   ##
==========================================
+ Coverage   57.50%   62.32%   +4.81%     
==========================================
  Files          32       40       +8     
  Lines        4594     5401     +807     
==========================================
+ Hits         2642     3366     +724     
- Misses       1729     1772      +43     
- Partials      223      263      +40     

Impacted Files	Coverage Δ
pkg/model/action.go	0.00% <0.00%> (ø)
pkg/model/step_result.go	0.00% <ø> (ø)
pkg/model/workflow.go	54.29% <0.00%> (+3.38%)	⬆️
pkg/container/docker_run.go	15.18% <21.73%> (+9.64%)	⬆️
pkg/container/docker_pull.go	33.33% <33.33%> (ø)
pkg/container/file_collector.go	44.85% <44.85%> (ø)
pkg/common/git/git.go	50.00% <47.91%> (ø)
pkg/container/docker_auth.go	47.61% <50.00%> (+2.61%)	⬆️
pkg/exprparser/interpreter.go	73.37% <53.48%> (-0.02%)	⬇️
pkg/artifacts/server.go	67.53% <60.00%> (+0.21%)	⬆️
... and 30 more

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[ChristopherHX]

Please add a test, but this fix shouldn't wait for a test

[mergify]

@KnisterPeter this pull request is now in conflict 😩

[mergify]

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[mergify]

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