chore: Move TEST_ALL_MODULES env_var to sub jobs (#8434)

Author: lqiu96

.kokoro/nightly/graalvm-native-17.cfg

@@ -30,9 +30,4 @@ env_vars: {
 env_vars: {
  key: "SECRET_MANAGER_KEYS"
  value: "java-it-service-account, java-bigqueryconnection-samples-secrets"
-}
-
-env_vars: {
- key: "TEST_ALL_MODULES"
- value: "true"
 }

.kokoro/nightly/graalvm-native.cfg

@@ -30,9 +30,4 @@ env_vars: {
 env_vars: {
  key: "SECRET_MANAGER_KEYS"
  value: "java-it-service-account, java-bigqueryconnection-samples-secrets"
-}
-
-env_vars: {
- key: "TEST_ALL_MODULES"
- value: "true"
 }

.kokoro/nightly/graalvm-sub-jobs/native-17/common.cfg

@@ -58,6 +58,11 @@ env_vars: {
  value: "20"
 }
 
+env_vars: {
+ key: "TEST_ALL_MODULES"
+ value: "true"
+}
+
 before_action {
  fetch_keystore {
  keystore_resource {

.kokoro/nightly/graalvm-sub-jobs/native/common.cfg

@@ -58,6 +58,11 @@ env_vars: {
  value: "20"
 }
 
+env_vars: {
+ key: "TEST_ALL_MODULES"
+ value: "true"
+}
+
 before_action {
  fetch_keystore {
  keystore_resource {