Move from drone to Github Actions for 2.9

[mitulshah-suse]

Move from drone to GHA for dev-v2.9 branch
ref: rancher/rancher#45375

Notes:

• This uses the ubuntu 22.04 patched runners with cgroupsv1 where prov tests are passing. It still has flaky test failures and increasing timeout for them in rancher repo will likely reduce flakiness further. ex: https://github.com/rancher/kontainer-driver-metadata/actions/runs/9657116486
• Have updated the version range for prov tests from 27-30, since 1.25 and 1.26 support is being removed from 2.9 and 1.30 support is being added
• Have removed most of the drone variables which were being used except for DRONE_BUILD_NUMBER. That one is being used in rancher/rancher prov tests scripts, so cannot remove that until rancher repo does the same.
• Removed regsync check from validate step

Any change in the rancher/rancher repo done for prov tests will directly impact KDM prov tests and might require further changes

[jakefhyde]

Few nits/questions.