test: update conformance settings (#2049)

In the conformance test, create the client with retryInfo and routing cookie disabled. Run all the tests except for the tests that specifically test the features, which are expected to fail because client is not handling them.

Also create another client with both features enabled and expected the tests to succeed.

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Fixes #<issue_number_goes_here> ☕️

If you write sample code, please follow the [samples format](
https://togithub.com/GoogleCloudPlatform/java-docs-samples/blob/main/SAMPLE_FORMAT.md).

Author: mutianf

.kokoro/conformance.sh

@@ -60,7 +60,9 @@ do
     configFlag="--enable_features_all"
   else
     echo "Testing the client with default settings for optional features..."
-    configFlag=""
+    # skipping routing cookie and retry info tests. When the feature is disabled, these
+    # tests are expected to fail
+    configFlag="-skip _Retry_WithRoutingCookie\|_Retry_WithRetryInfo"
   fi
 
   pushd .

test-proxy/src/main/java/com/google/cloud/bigtable/testproxy/CbtTestProxy.java

@@ -208,6 +208,9 @@ public synchronized void createClient(
             .setInstanceId(request.getInstanceId())
             .setAppProfileId(request.getAppProfileId());
 
+    settingsBuilder.stubSettings().setEnableRoutingCookie(false);
+    settingsBuilder.stubSettings().setEnableRetryInfo(false);
+
     if (request.hasPerOperationTimeout()) {
       Duration newTimeout = Duration.ofMillis(Durations.toMillis(request.getPerOperationTimeout()));
       settingsBuilder = overrideTimeoutSetting(newTimeout, settingsBuilder);
@@ -231,6 +234,8 @@ public synchronized void createClient(
         }
       }
       settingsBuilder.stubSettings().bulkMutateRowsSettings().setServerInitiatedFlowControl(true);
+      settingsBuilder.stubSettings().setEnableRoutingCookie(true);
+      settingsBuilder.stubSettings().setEnableRetryInfo(true);
     }
 
     // Create and store CbtClient for later use