fix: pin stringer to module-managed version in generate directives

Replace bare `stringer` invocations with `go tool stringer` so that
go generate always uses the version pinned via the tool directive in
go.mod (golang.org/x/tools v0.37.0) rather than whatever stringer
binary happens to be on PATH.

Author: Krishnan Parthasarathi

estream/types.go

@@ -19,7 +19,7 @@
 
 package estream
 
-//go:generate stringer -type=blockID -trimprefix=block
+//go:generate go tool stringer -type=blockID -trimprefix=block
 
 type blockID int8
 
@@ -36,7 +36,7 @@ const (
 
 type checksumType uint8
 
-//go:generate stringer -type=checksumType -trimprefix=checksumType
+//go:generate go tool stringer -type=checksumType -trimprefix=checksumType
 
 const (
 	checksumTypeNone checksumType = iota

heal-commands.go

@@ -364,7 +364,7 @@ type SetStatus struct {
 	Disks        []Disk `json:"disks"`
 }
 
-//go:generate stringer -type=HealingDriveReason -output=heal-commands-drive-reason_gen.go -trimprefix=HealingReason $GOFILE
+//go:generate go tool stringer -type=HealingDriveReason -output=heal-commands-drive-reason_gen.go -trimprefix=HealingReason $GOFILE
 type HealingDriveReason int8
 
 const (
@@ -374,7 +374,7 @@ const (
 	HealingReasonOfflineDisk
 )
 
-//go:generate stringer -type=OfflineReason -output=heal-commands-offline-reason_gen.go -trimprefix=OfflineReason $GOFILE
+//go:generate go tool stringer -type=OfflineReason -output=heal-commands-offline-reason_gen.go -trimprefix=OfflineReason $GOFILE
 type OfflineReason int8
 
 const (
@@ -385,7 +385,7 @@ const (
 	OfflineReasonDriveTimeout
 )
 
-//go:generate stringer -type=OfflineDecision -output=heal-commands-offline-decision_gen.go -trimprefix=OfflineDecision $GOFILE
+//go:generate go tool stringer -type=OfflineDecision -output=heal-commands-offline-decision_gen.go -trimprefix=OfflineDecision $GOFILE
 type OfflineDecision int8
 
 const (