Update supported k8s version wording

General MR

Summary

Updates wording to clarify BB's position on k8s version. Also updates to reference testing on 1.24 (release testing is on RKE2 1.24.4).

Preview of doc: https://repo1.dso.mil/platform-one/big-bang/bigbang/-/blob/k8s-version-docs/docs/prerequisites/kubernetes-preconfiguration.md#kubernetes-version

added kinddocs label

assigned to @micah.nagel

changed the description

requested review from @ryan.thompson.44 and @michaelmcleroy

added statusreview label

approved this merge request

changed milestone to %1.50.0

merged

mentioned in commit fe16ac8b