Update nightly tests to run from commits on specified branches

[rancher-max]

These tests should run all integration and validation tests every night on multiple OSes as seen in the Support matrix. They should run based on commitids from specific branches. The branches should be easily configurable as a new branch is added (and another removed) every few months when new minor versions are released.

As of this writing, the branches where it should pull commits from are: master, release-1.24, release-1.23, and release-1.22.

[caroline-suse-rancher]

@ShylajaDevadiga is this in progress?

[ShylajaDevadiga]

We will revert back to this task when the priority tasks with OS and PR runs are complete. Moving it to backlog for now.