Auth: Add access token to in-proc communication and ServiceIdentity (#98926)

Use fake access token for in-proc grpc and add ServiceIdentity 
---------

Co-authored-by: gamab <gabriel.mabille@grafana.com>
Co-authored-by: Karl Persson <23356117+kalleep@users.noreply.github.com>

pkg/storage/unified/sql/test/integration_test.go

@@ -5,15 +5,16 @@ import (
 	"testing"
 	"time"
 
+	"github.com/go-jose/go-jose/v3/jwt"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/stretchr/testify/require"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 
-	claims "github.com/grafana/authlib/types"
+	"github.com/grafana/authlib/authn"
+	"github.com/grafana/authlib/types"
 	"github.com/grafana/dskit/services"
-	"github.com/grafana/grafana/pkg/apimachinery/identity"
 	"github.com/grafana/grafana/pkg/apimachinery/utils"
 	infraDB "github.com/grafana/grafana/pkg/infra/db"
 	"github.com/grafana/grafana/pkg/infra/tracing"
@@ -70,15 +71,13 @@ func TestIntegrationBackendHappyPath(t *testing.T) {
 		t.Skip("skipping integration test")
 	}
 
-	testUserA := &identity.StaticRequester{
-		Type:           claims.TypeUser,
-		Login:          "testuser",
-		UserID:         123,
-		UserUID:        "u123",
-		OrgRole:        identity.RoleAdmin,
-		IsGrafanaAdmin: true, // can do anything
-	}
-	ctx := identity.WithRequester(context.Background(), testUserA)
+	ctx := types.WithAuthInfo(context.Background(), authn.NewAccessTokenAuthInfo(authn.Claims[authn.AccessTokenClaims]{
+		Claims: jwt.Claims{
+			Subject: "testuser",
+		},
+		Rest: authn.AccessTokenClaims{},
+	}))
+
 	backend, server := newServer(t, nil)
 
 	stream, err := backend.WatchWriteEvents(context.Background()) // Using a different context to avoid canceling the stream after the DefaultContextTimeout
@@ -420,15 +419,12 @@ func TestClientServer(t *testing.T) {
 	require.NoError(t, err)
 	var client resource.ResourceStoreClient
 
-	// Test with an admin identity
-	clientCtx := identity.WithRequester(ctx, &identity.StaticRequester{
-		Type:           claims.TypeUser,
-		Login:          "testuser",
-		UserID:         123,
-		UserUID:        "u123",
-		OrgRole:        identity.RoleAdmin,
-		IsGrafanaAdmin: true, // can do anything
-	})
+	clientCtx := types.WithAuthInfo(context.Background(), authn.NewAccessTokenAuthInfo(authn.Claims[authn.AccessTokenClaims]{
+		Claims: jwt.Claims{
+			Subject: "testuser",
+		},
+		Rest: authn.AccessTokenClaims{},
+	}))
 
 	t.Run("Start and stop service", func(t *testing.T) {
 		err = services.StartAndAwaitRunning(ctx, svc)