fix: reporting fetch failure as job error and log the error

[ChristopherHX]

E.g. if GoGitAction Cache had a fetch failure this error did not trigger report jobResult Failure.

Also the error has been not printed until the last message before exit of act.

• adds tests for both corner cases

Closes #59

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	2		0	0.01s
✅ REPOSITORY	gitleaks	yes		no	2.75s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	grype	yes		no	9.36s
✅ REPOSITORY	secretlint	yes		no	1.23s
✅ REPOSITORY	trivy-sbom	yes		no	0.39s
✅ REPOSITORY	trufflehog	yes		no	3.94s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
pkg/runner/job_executor.go	91.66%	1 Missing ⚠️

Files with missing lines	Coverage Δ
pkg/runner/job_executor.go	87.74% <91.66%> (+0.72%)	⬆️

... and 6 files with indirect coverage changes

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