mgr/dashboard: Fix for misleading "Orchestrator is not available" error

mgr/dashboard: Fix for misleading "Orchestrator is not available" error

When switching between options, in the Services and Inventory page sometimes it shows "Orchestrator not available" error which appears for 2-3 second and then disappears and shows the normal page. This commit fixes that.

Fixes: https://tracker.ceph.com/issues/48448
Signed-off-by: Nizamudeen A <nia@redhat.com>
(cherry picked from commit b2b42a1e6e161125519380900ed14737d51dae01)

 Conflicts:
	src/pybind/mgr/dashboard/frontend/src/app/ceph/cluster/inventory/inventory.component.html
	src/pybind/mgr/dashboard/frontend/src/app/ceph/cluster/inventory/inventory.component.ts
	src/pybind/mgr/dashboard/frontend/src/app/ceph/cluster/services/services.component.html
	src/pybind/mgr/dashboard/frontend/src/app/ceph/cluster/services/services.component.ts
 - Fixed some minor conflicts due to frontend code divergence in master vs. octopus;