[ppc64le] ppc64le-hmc tests fail in bootloader_start
There is an issue with ppc64le-hmc-single-disk workers. All tests fail:
openQA test in scenario sle-15-SP3-Full-ppc64le-allmodules+registration@ppc64le-hmc-single-disk fails in bootloader_start.
"HSCL9010 This operation is only allowed when the managed system is in the Standby or Operating state"