CephMgrSuite (ceph_mgr_test.go) exercised the Rook orchestrator mgr
module through `ceph orch` commands. Remove the suite together with its
GitHub Actions workflow (integration-test-mgr-suite.yaml), whose sole
purpose was to run this suite, gated behind the run-mgr-suite label and
a nightly cron.
No other code references the deleted suite. Its helpers (logBytesInfo,
the defaultTries constant, and the host/service/serviceStatus types)
were all local to the file, so nothing is left orphaned.
Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>