ci(bigquery): configure us-east7 endpoint overrides in Kokoro integration tests

Author: jinseopkim0

.kokoro/presubmit/bigquery-graalvm-native-presubmit.cfg

@@ -22,6 +22,11 @@ env_vars: {
   value: "gcloud-devel"
 }
 
+env_vars: {
+  key: "BIGQUERY_ENDPOINT"
+  value: "https://us-east7-bigquery.googleapis.com"
+}
+
 env_vars: {
   key: "GOOGLE_APPLICATION_CREDENTIALS"
   value: "secret_manager/java-it-service-account"

.kokoro/presubmit/bigquery-integration.cfg

@@ -22,6 +22,11 @@ env_vars: {
   value: "gcloud-devel"
 }
 
+env_vars: {
+  key: "BIGQUERY_ENDPOINT"
+  value: "https://us-east7-bigquery.googleapis.com"
+}
+
 env_vars: {
   key: "GOOGLE_APPLICATION_CREDENTIALS"
   value: "secret_manager/java-it-service-account"

.kokoro/presubmit/bigquerystorage-graalvm-native-presubmit.cfg

@@ -22,6 +22,11 @@ env_vars: {
   value: "gcloud-devel"
 }
 
+env_vars: {
+  key: "BIGQUERY_STORAGE_ENDPOINT"
+  value: "us-east7-bigquerystorage.googleapis.com:443"
+}
+
 env_vars: {
   key: "GOOGLE_APPLICATION_CREDENTIALS"
   value: "secret_manager/java-it-service-account"

.kokoro/presubmit/bigquerystorage-integration.cfg

@@ -22,6 +22,11 @@ env_vars: {
   value: "gcloud-devel"
 }
 
+env_vars: {
+  key: "BIGQUERY_STORAGE_ENDPOINT"
+  value: "us-east7-bigquerystorage.googleapis.com:443"
+}
+
 env_vars: {
   key: "GOOGLE_APPLICATION_CREDENTIALS"
   value: "secret_manager/java-it-service-account"