chore(spanner): use different project for directpath presubmit integration tests (googleapis#3494)

* chore(spanner): use different project for directpath presubmit integration tests

* change SA

* Fix secret manager

Author: sakthivelmanii

.kokoro/build.sh

@@ -113,8 +113,8 @@ integration-directpath-enabled)
       -Dclirr.skip=true \
       -Denforcer.skip=true \
       -Dmaven.main.skip=true \
-      -Dspanner.gce.config.project_id=gcloud-devel \
-      -Dspanner.testenv.instance=projects/gcloud-devel/instances/java-client-integration-tests-directpath \
+      -Dspanner.testenv.instance=projects/span-cloud-testing/instances/spanner-java-client-directpath \
+      -Dspanner.gce.config.project_id=span-cloud-testing \
       -fae \
       verify
     RETURN_CODE=$?

.kokoro/presubmit/integration-directpath-enabled.cfg

@@ -24,12 +24,12 @@ env_vars: {
 
 env_vars: {
   key: "GOOGLE_APPLICATION_CREDENTIALS"
-  value: "secret_manager/java-it-service-account"
+  value: "secret_manager/java-client-testing"
 }
 
 env_vars: {
   key: "SECRET_MANAGER_KEYS"
-  value: "java-it-service-account"
+  value: "java-client-testing"
 }
 
 env_vars: {