CloudMigrations: Query GMS for a presigned upload url at upload time (#90505)

query GMS for an upload url at upload time

pkg/services/cloudmigration/gmsclient/inmemory_client.go

@@ -58,7 +58,6 @@ func (c *memoryClientImpl) StartSnapshot(context.Context, cloudmigration.CloudMi
 	}
 	c.snapshot = &cloudmigration.StartSnapshotResponse{
 		EncryptionKey:        fmt.Sprintf("%x", publicKey[:]),
-		UploadURL:            "localhost:3000",
 		SnapshotID:           uuid.NewString(),
 		MaxItemsPerPartition: 10,
 		Algo:                 "nacl",
@@ -92,3 +91,7 @@ func (c *memoryClientImpl) GetSnapshotStatus(ctx context.Context, session cloudm
 
 	return gmsResp, nil
 }
+
+func (c *memoryClientImpl) CreatePresignedUploadUrl(ctx context.Context, sess cloudmigration.CloudMigrationSession, snapshot cloudmigration.CloudMigrationSnapshot) (string, error) {
+	return "http://localhost:3000", nil
+}