cluster-reslover: add support for StepAction

[vdemeester]

Changes

This adds support for StepAction in the cluster resolver.

Signed-off-by: Vincent Demeester [email protected]

/kind feature
/wip

• Needs updated docs
• Needs some unit tests

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
• Has Tests included if any functionality added or changed
• pre-commit Passed
• Follows the commit message standard
• Meets the Tekton contributor standards (including functionality, content, code)
• Has a kind label. You can add one by adding a comment on this PR that contains /kind <type>. Valid types are bug, cleanup, design, documentation, feature, flake, misc, question, tep
• Release notes block below has been updated with any user facing changes (API changes, bug fixes, changes requiring upgrade notices or deprecation warnings). See some examples of good release notes.
• Release notes contains the string "action required" if the change requires additional action from users switching to the new release

Release Notes

StepAction are now supported to a refered via the cluster resolver.

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/resolution/resolver/cluster/resolver.go	83.3%	69.3%	-14.0

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/resolution/resolver/cluster/resolver.go	83.3%	69.3%	-14.0

[chitrangpatel]

/retest

[chitrangpatel]

/lgtm

[tekton-robot]

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