fix: trigger heal if one of the parts are not found (#11358)

Previously we added heal trigger when bit-rot checks
failed, now extend that to support heal when parts
are not found either. This healing gets only triggered
if we can successfully decode the object i.e read
quorum is still satisfied for the object.

cmd/global-heal.go

@@ -200,8 +200,8 @@ func healErasureSet(ctx context.Context, setIndex int, buckets []BucketInfo, dis
 	return nil
 }
 
-// deepHealObject heals given object path in deep to fix bitrot.
-func deepHealObject(bucket, object, versionID string) {
+// healObject heals given object path in deep to fix bitrot.
+func healObject(bucket, object, versionID string, scan madmin.HealScanMode) {
 	// Get background heal sequence to send elements to heal
 	bgSeq, ok := globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
 	if ok {
@@ -211,7 +211,7 @@ func deepHealObject(bucket, object, versionID string) {
 			versionID: versionID,
 			opts: &madmin.HealOpts{
 				Remove:   true, // if found dangling purge it.
-				ScanMode: madmin.HealDeepScan,
+				ScanMode: scan,
 			},
 		}
 	}