[wip] add e2e to github action

[jkhelil]

Changes

Setup a matrix that runs all current integration jobs in GitHub actions.

fixes #2470

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Release Notes

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[jkhelil]

/test pull-tekton-operator-integration-tests

[tekton-robot]

@jkhelil: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-tekton-operator-integration-tests	84559a5	link	true	/test pull-tekton-operator-integration-tests

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