fix: the params in step replace other fields in step that are not in stepaction

[cugykw]

Fixes: #7753

Prior to this PR, the step contains params, these params are
passed to stepaction, but it may be passed to other fields in step,
such as: StdoutConfig.

This commit will only pass the fields in stepaction and replace
these fields with params in step.

/kind bug
/assign @chitrangpatel

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Release Notes

Pass only the fields in `stepaction` and replace these fields with the `params` in step.

[tekton-robot]

Hi @cugykw. Thanks for your PR.

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[chitrangpatel]

/ok-to-test

[chitrangpatel]

Thanks for the catch and the fix @cugykw!

/approve

[cugykw]

/cc @vdemeester

[vdemeester]

/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chitrangpatel, vdemeester

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