Expose resourcemodifiers package to pkg for plugin reuse (#10759)

Move the resourcemodifiers package from internal/ to pkg/ so that external
plugins, such as Restore Item Action (RIA) plugins, can import and reuse
Velero's built-in resource modifier implementation.

Due to Go's internal package visibility restrictions, external plugins
cannot import packages located under internal/. Relocating resourcemodifiers
to pkg/ allows plugins to evaluate and apply resource modifier rules to
in-memory resource objects prior to validation or restore execution,
ensuring consistent behavior with the Velero server without duplicate code.

Update all internal import paths and add an unreleased changelog entry.

Fixes #10668

Signed-off-by: Adam Zhang <adam.zhang@broadcom.com>

changelogs/unreleased/10759-adam-jian-zhang

@@ -0,0 +1 @@
+Move internal/resourcemodifiers to pkg/resourcemodifiers for plugin reuse

pkg/cmd/cli/restore/create.go

@@ -31,7 +31,6 @@ import (
 	"k8s.io/client-go/tools/cache"
 	kbclient "sigs.k8s.io/controller-runtime/pkg/client"
 
-	"github.com/velero-io/velero/internal/resourcemodifiers"
 	"github.com/velero-io/velero/internal/resourcepolicies"
 	api "github.com/velero-io/velero/pkg/apis/velero/v1"
 	"github.com/velero-io/velero/pkg/client"
@@ -39,6 +38,7 @@ import (
 	"github.com/velero-io/velero/pkg/cmd/cli"
 	"github.com/velero-io/velero/pkg/cmd/util/flag"
 	"github.com/velero-io/velero/pkg/cmd/util/output"
+	"github.com/velero-io/velero/pkg/resourcemodifiers"
 	"github.com/velero-io/velero/pkg/util/boolptr"
 	"github.com/velero-io/velero/pkg/util/kube"
 	"github.com/velero-io/velero/pkg/util/velero/restore"

pkg/controller/restore_controller.go

@@ -43,7 +43,6 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
 
 	"github.com/velero-io/velero/internal/hook"
-	"github.com/velero-io/velero/internal/resourcemodifiers"
 	"github.com/velero-io/velero/internal/resourcepolicies"
 	"github.com/velero-io/velero/internal/volume"
 	api "github.com/velero-io/velero/pkg/apis/velero/v1"
@@ -54,6 +53,7 @@ import (
 	"github.com/velero-io/velero/pkg/persistence"
 	"github.com/velero-io/velero/pkg/plugin/clientmgmt"
 	"github.com/velero-io/velero/pkg/plugin/framework"
+	"github.com/velero-io/velero/pkg/resourcemodifiers"
 	pkgrestore "github.com/velero-io/velero/pkg/restore"
 	"github.com/velero-io/velero/pkg/util/boolptr"
 	"github.com/velero-io/velero/pkg/util/collections"

pkg/controller/restore_controller_test.go

@@ -35,7 +35,6 @@ import (
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 
-	"github.com/velero-io/velero/internal/resourcemodifiers"
 	"github.com/velero-io/velero/internal/volume"
 	velerov1api "github.com/velero-io/velero/pkg/apis/velero/v1"
 	"github.com/velero-io/velero/pkg/builder"
@@ -45,6 +44,7 @@ import (
 	"github.com/velero-io/velero/pkg/plugin/framework"
 	pluginmocks "github.com/velero-io/velero/pkg/plugin/mocks"
 	riav2 "github.com/velero-io/velero/pkg/plugin/velero/restoreitemaction/v2"
+	"github.com/velero-io/velero/pkg/resourcemodifiers"
 	pkgrestore "github.com/velero-io/velero/pkg/restore"
 	velerotest "github.com/velero-io/velero/pkg/test"
 	"github.com/velero-io/velero/pkg/util/logging"

pkg/restore/request.go

@@ -25,11 +25,11 @@ import (
 	"github.com/sirupsen/logrus"
 	"k8s.io/apimachinery/pkg/runtime"
 
-	"github.com/velero-io/velero/internal/resourcemodifiers"
 	"github.com/velero-io/velero/internal/resourcepolicies"
 	"github.com/velero-io/velero/internal/volume"
 	velerov1api "github.com/velero-io/velero/pkg/apis/velero/v1"
 	"github.com/velero-io/velero/pkg/itemoperation"
+	"github.com/velero-io/velero/pkg/resourcemodifiers"
 	"github.com/velero-io/velero/pkg/util/kube"
 )
 

pkg/restore/restore.go

@@ -56,7 +56,6 @@ import (
 
 	"github.com/velero-io/velero/internal/credentials"
 	"github.com/velero-io/velero/internal/hook"
-	"github.com/velero-io/velero/internal/resourcemodifiers"
 	"github.com/velero-io/velero/internal/resourcepolicies"
 	"github.com/velero-io/velero/internal/volume"
 	velerov1api "github.com/velero-io/velero/pkg/apis/velero/v1"
@@ -74,6 +73,7 @@ import (
 	"github.com/velero-io/velero/pkg/podexec"
 	"github.com/velero-io/velero/pkg/podvolume"
 	"github.com/velero-io/velero/pkg/podvolume/configs"
+	"github.com/velero-io/velero/pkg/resourcemodifiers"
 	"github.com/velero-io/velero/pkg/types"
 	"github.com/velero-io/velero/pkg/util/boolptr"
 	"github.com/velero-io/velero/pkg/util/collections"