openhcl: servicing: tests from v.prev <-> v.current
From TODO in #445
OpenHCL servicing tests should verify that OpenHCL can upgrade from the previous released version (currently the tip of release/2411 branch to main, for example), and also roll back.
Now that we have a 2411 fork producing artifacts, this should be doable? Steps would be to bless some build as 'official', artifact it somewhere, then update the test infra in main to pull down that build and use it for servicing tests. The internal servicing tests do all this already for internal builds, and i'd expect 99% of the code there to be copyable for this.
@justus-camp-microsoft already added this test, but it's failing periodically, so it's ignored. We need to debug this with priority.
PR is #941