Update the URL value in the ROKS URL field in the platform-auth-idp configmap

[bluzarraga]

What this PR does / why we need it: This PR allows us to BR the platform-auth-idp configmap by updating the ROKS_URL field. This field previously would cause problems in ROKS environments because it would not be updated by the IM operator so if restoring to a new cluster, it would still point to the old cluster. Going forward IM will update this value automatically but for backwards compatibility, we need to be able to update this value to preserve any configurations made in the configmap

A couple things remaining:

• check version so we do not perform these steps when IM can make this update itself
• check the cs-onprem-tenant-config which should configure a custom domain name
  • Right now the accompanying onprem-tenant-config script is only run when following OADP instructions, can we include it in this script so it is run automatically and during spectrum fusion?
• add the configmap to the labeling script

Update to the remaining items

• created a second version of the script to be used for CS 4.11+ and 4.6.10+ as it is difficult to determine the version in use without adding more info on what the operator namespace is or significant permissions
• We do not need to check for the cs-onprem-tenant-config cm because it does not affect the value we need

Which issue(s) this PR fixes:
Fixes # https://github.ibm.com/IBMPrivateCloud/roadmap/issues/65249

Special notes for your reviewer:

1. How the test is done?

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[qpdpQ]

test looks good to me:

...
[INFO] Creating dummy route to update ROKS_URL value...
route.route.openshift.io/dummy created
[INFO] Grabbing new hostname...
[INFO] New hostname: saml.cp.fyre.ibm.com
[INFO] New ROKS_URL value: https://oauth-openshift.apps.saml.cp.fyre.ibm.com
[INFO] Updating ROKS_URL value in platform-auth-idp configmap...
configmap/platform-auth-idp patched (no change)
[INFO] Deleting dummy route from namespace cpfs...
route.route.openshift.io "dummy" deleted
...

restore succeeded

[qpdpQ]

/lgtm