Add OpenShift Rollouts Route Plugin E2E tests to Rollouts tests

[jgwest]

What type of PR is this?

/kind enhancement

What does this PR do / why we need it:

• This adds runs the E2E tests from https://github.com/argoproj-labs/rollouts-plugin-trafficrouter-openshift on gitops-operator

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from jgwest. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[jgwest]

/test all

[jgwest]

/test all

[jgwest]

/retest

[jgwest]

/retest

[jparsai]

/lgtm

[jgwest]

Thanks @jparsai!