ci(spanner): Skip failing Directpath tests due to missing trailers

Author: sakthivelmanii

google-cloud-spanner/src/test/java/com/google/cloud/spanner/ITTransactionRetryTest.java

@@ -36,6 +36,10 @@ public class ITTransactionRetryTest {
   @Test
   public void TestRetryInfo() {
     assumeFalse("emulator does not support parallel transaction", isUsingEmulator());
+    // TODO(sakthivelmani) - Re-enable once b/422916293 is resolved
+    assumeFalse(
+        "Skipping the test due to a known bug b/422916293",
+        env.getTestHelper().getOptions().isEnableDirectAccess());
 
     // Creating a database with the table which contains INT64 columns
     Database db =

google-cloud-spanner/src/test/java/com/google/cloud/spanner/connection/it/ITRetryDmlAsPartitionedDmlTest.java

@@ -86,6 +86,10 @@ public static void setupTestData() {
 
   @Test
   public void testDmlFailsIfMutationLimitExceeded() {
+    // TODO(sakthivelmani) - Re-enable once b/422916293 is resolved
+    assumeFalse(
+        "Skipping the test due to a known bug b/422916293",
+        env.getTestHelper().getOptions().isEnableDirectAccess());
     try (Connection connection = createConnection()) {
       connection.setAutocommit(true);
       assertThrows(
@@ -138,6 +142,10 @@ public void retryDmlAsPartitionedDmlFinished(
 
   @Test
   public void testRetryDmlAsPartitionedDml_failsForLargeInserts() throws Exception {
+    // TODO(sakthivelmani) - Re-enable once b/422916293 is resolved
+    assumeFalse(
+        "Skipping the test due to a known bug b/422916293",
+        env.getTestHelper().getOptions().isEnableDirectAccess());
     try (Connection connection = createConnection()) {
       connection.setAutocommit(true);
       connection.setAutocommitDmlMode(