chore(spanner): revert cloud-devel to prod

Author: harshachinta

.kokoro/build.sh

@@ -128,9 +128,8 @@ integration-multiplexed-sessions-enabled)
       -Dclirr.skip=true \
       -Denforcer.skip=true \
       -Dmaven.main.skip=true \
-      -Dspanner.gce.config.server_url=https://staging-wrenchworks.sandbox.googleapis.com \
-      -Dspanner.gce.config.project_id=span-cloud-testing \
-      -Dspanner.testenv.instance=projects/span-cloud-testing/instances/spanner-java-client-testing \
+      -Dspanner.gce.config.project_id=gcloud-devel \
+      -Dspanner.testenv.instance=projects/gcloud-devel/instances/java-client-integration-tests-multiplexed-sessions \
       -fae \
       verify
     RETURN_CODE=$?

.kokoro/presubmit/common.cfg

@@ -26,7 +26,7 @@ env_vars: {
 
 env_vars: {
   key: "GCLOUD_PROJECT"
-  value: "span-cloud-testing"
+  value: "gcloud-devel"
 }
 
 before_action {

.kokoro/presubmit/integration-multiplexed-sessions-enabled.cfg

@@ -14,22 +14,22 @@ env_vars: {
 # TODO: remove this after we've migrated all tests and scripts
 env_vars: {
   key: "GCLOUD_PROJECT"
-  value: "span-cloud-testing"
+  value: "gcloud-devel"
 }
 
 env_vars: {
   key: "GOOGLE_CLOUD_PROJECT"
-  value: "span-cloud-testing"
+  value: "gcloud-devel"
 }
 
 env_vars: {
   key: "GOOGLE_APPLICATION_CREDENTIALS"
-  value: "secret_manager/java-client-testing"
+  value: "secret_manager/java-it-service-account"
 }
 
 env_vars: {
   key: "SECRET_MANAGER_KEYS"
-  value: "java-client-testing"
+  value: "java-it-service-account"
 }
 
 env_vars: {