fix: simplify background heal and trigger heal items early (#9928)

Bonus fix during versioning merge one of the PR was missing
the offline/online disk count fix from #9801 port it correctly
over to the master branch from release.

Additionally, add versionID support for MRF

Fixes #9910
Fixes #9931

cmd/fs-v1.go

@@ -1552,9 +1552,5 @@ func (fs *FSObjects) IsReady(_ context.Context) bool {
 		return false
 	}
 
-	globalObjLayerMutex.RLock()
-	res := globalObjectAPI != nil && !globalSafeMode
-	globalObjLayerMutex.RUnlock()
-
-	return res
+	return newObjectLayerFn() != nil
 }