fix: FORMS-1670 install oc for pr undeploy action.

[WalterMoar]

Description

GitHub has changed the ubuntu-latest image to no longer include the oc command. Add it as a separate step, similar to how the PR Deploy Action works.

Type of Change

fix (a bug fix)

Checklist

• I have read the CONTRIBUTING doc
• I have checked that unit tests pass locally with my changes
• I have run the npm script lint on the frontend and backend
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have approval from the product owner for the contribution in this pull request

Further comments

Note: We unfortunately have to merge Actions before we can try them out. Fingers crossed.

[usingtechnology]

Oh, wow! Simple... nice they built in that action. (And you knew about it).

[WalterMoar]

Note: it's nice having control over the version of the tools, so we can match it to the OCP version. The downside is that we need to maintain it, so this (and the version in the Deploy Action) will need to be bumped to 4.16 after the double-update of OCP that is coming early next year. Maybe we can put this into an environment variable at some point.

[usingtechnology]

Interesting... yeah, one more thing to stay on top of and one more point of failure. Old repos look out!

[WalterMoar]

Oh, wow! Simple... nice they built in that action. (And you knew about it).

The full story is that one day the Deploy Action stopped working. GitHub had done a surprise change of ubuntu-latest to 24.04, and they pared it down to no longer include a bunch of stuff - including oc. GitHub broke enough people that they reverted ubuntu-latest to 22.04 and then publicized that the change to 24.04 was coming - I guess we passed that date where 24.04 without oc is now the runner for the Actions.

We had previously fixed the Deploy action to explicitly install oc but I guess we never did it for Undeploy because it was still working after GitHub reverted to 22.04!