Promote new admin console to default

[stianst]

Documentation updates: keycloak/keycloak-documentation#1623

Closes #13242

[ssilvert]

LGTM

[mposolda]

@stianst LGTM.

I assume that this was also discussed with QA team and the pipeline runs for admin console tests are somehow updated

[stianst]

@stianst LGTM.

I assume that this was also discussed with QA team and the pipeline runs for admin console tests are somehow updated

Good point, forgot that those tests run in the internal pipeline. We'll need some plan for this for sure, but perhaps we can sort this out after the release.

@miquelsi since we're trying to get the release out the door, would it be okay if we break the admin tests in the pipeline for now? Not sure if we should just get rid of the tests of for the old admin console now, or tweak the pipeline to enable the old admin console to continue testing that?

[vmuzikar]

Just to chime in. I think the "fix" for the old console tests should be fairly simple. Just enable/disable relevant features or change the used theme at the AbstractConsoleTest level.