feat(ocp): add optional flag to force platform as openshift

[tthvo]

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Fixes #805

Description of the change:

Provided an optional flag to overwrite platform discovery to set openshift to true.

With these changes, I try to utilize kustomize. I can try automatically add the patch the deployment like below but it looks not so nice:

cd config/manager && $(KUSTOMIZE) edit add patch \
--path patches/force_openshift_patch.yaml \
--group apps \
--version v1 \
--kind Deployment \
--name controller-manager \
--namespace system

But things can be much easier with yq. What do you think?

Motivation for the change:

See #805

How to manually test:

• Uncomment the patch in manager.yaml
• make oci-build bundle bundle-build
• Push the controller and bundle images.
• Launch a local kind cluster and logs the controller pod. It should show the following message regardless.

  2024-05-03T18:34:47Z	INFO	setup	detected OpenShift environment
  

[ebaron]

/build_test

[ebaron]

Looks good, thanks @tthvo!

[github-actions]

/build_test : At least one test failed ❌.
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[andrewazores]

^ scorecards still haven't been fixed in this base branch