Add command to re-run GitHub Actions tests

[andreyvelich]

Followup on Katib: kubeflow/katib#2385 and KFP: kubeflow/pipelines#10930 PRs.

I added ability to re-run failed GitHub Actions without manually re-trigger them.
That allows contributors without GitHub write access to trigger the failed actions.

The following commands are supported by this action:

/rerun-all - rerun all failed workflows.
/rerun-workflow <workflow name> - rerun a specific failed workflow. Only one workflow name can be specified.

Reference: https://github.com/estroz/rerun-actions

/assign @kubeflow/wg-training-leads @rimolive

[tenzen-y]

/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tenzen-y

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• OWNERS [tenzen-y]

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[coveralls]

Pull Request Test Coverage Report for Build 9942318462

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 7 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.06%) to 35.366%

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Files with Coverage Reduction	New Missed Lines	%
pkg/controller.v1/mpi/mpijob.go	1	91.06%
pkg/controller.v1/mpi/mpijob_controller.go	6	80.67%

Totals
Change from base Build 9906458669:	-0.06%
Covered Lines:	4373
Relevant Lines:	12365

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💛 - Coveralls