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

pkg/madmin/heal-commands.go

@@ -77,7 +77,6 @@ type HealTaskStatus struct {
 	FailureDetail string    `json:"detail"`
 	StartTime     time.Time `json:"startTime"`
 	HealSettings  HealOpts  `json:"settings"`
-	NumDisks      int       `json:"numDisks"`
 
 	Items []HealResultItem `json:"items,omitempty"`
 }