Update CrownJewel test and serialization methods

Updated the test condition in crown_jewels_test.go to use Proto.Equal for object comparisons. Also, swapped out the FastMarshal and FastUnmarshal methods with protojson's Marshal and Unmarshal in the CrownJewels service.

lib/services/crown_jewel.go

@@ -22,11 +22,11 @@ import (
 	"context"
 
 	"github.com/gravitational/trace"
+	"google.golang.org/protobuf/encoding/protojson"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/known/timestamppb"
 
 	crownjewelv1 "github.com/gravitational/teleport/api/gen/proto/go/teleport/crownjewel/v1"
-	"github.com/gravitational/teleport/lib/utils"
 )
 
 // CrownJewels is the interface for managing crown jewel resources.
@@ -57,7 +57,7 @@ func MarshalCrownJewel(object *crownjewelv1.CrownJewel, opts ...MarshalOption) (
 		object = proto.Clone(object).(*crownjewelv1.CrownJewel)
 		object.Metadata.Revision = ""
 	}
-	data, err := utils.FastMarshal(object)
+	data, err := protojson.Marshal(object)
 	if err != nil {
 		return nil, trace.Wrap(err)
 	}
@@ -74,7 +74,7 @@ func UnmarshalCrownJewel(data []byte, opts ...MarshalOption) (*crownjewelv1.Crow
 		return nil, trace.Wrap(err)
 	}
 	var obj crownjewelv1.CrownJewel
-	if err := utils.FastUnmarshal(data, &obj); err != nil {
+	if err := protojson.Unmarshal(data, &obj); err != nil {
 		return nil, trace.BadParameter(err.Error())
 	}
 	if cfg.Revision != "" {

lib/services/crown_jewels_test.go

@@ -95,7 +95,7 @@ func TestUnmarshalCrownJewel(t *testing.T) {
 
 	obj, err := UnmarshalCrownJewel(data)
 	require.NoError(t, err)
-	require.Equal(t, expected, obj)
+	require.True(t, proto.Equal(expected, obj), "CrownJewel objects are not equal")
 }
 
 const correctCrownJewelYAML = `
@@ -112,7 +112,7 @@ spec:
       tags:
         - key: env
           values:
-            - value: prod
+            - prod
       types:
         - ec2
   teleport_matchers: