Configure client id and client secret in the config file

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=224158599

java/google/registry/config/RegistryConfig.java

@@ -1258,15 +1258,18 @@ public final class RegistryConfig {
       return "/tos";
     }
 
-    /**
-     * Returns the name of the OAuth2 client secrets file.
-     *
-     * <p>This is the name of a resource relative to the root of the class tree.
-     */
+    /** OAuth client ID used by the nomulus tool. */
     @Provides
-    @Config("clientSecretFilename")
-    public static String provideClientSecretFilename(RegistryConfigSettings config) {
-      return config.registryTool.clientSecretFilename;
+    @Config("toolsClientId")
+    public static String provideToolsClientId(RegistryConfigSettings config) {
+      return config.registryTool.clientId;
+    }
+
+    /** OAuth client secret used by the nomulus tool. */
+    @Provides
+    @Config("toolsClientSecret")
+    public static String provideToolsClientSecret(RegistryConfigSettings config) {
+      return config.registryTool.clientSecret;
     }
 
     @Provides
@@ -1551,12 +1554,6 @@ public final class RegistryConfig {
     return Duration.standardDays(CONFIG_SETTINGS.get().registryPolicy.contactAutomaticTransferDays);
   }
 
-  /** Provided for testing. */
-  @VisibleForTesting
-  public static String getClientSecretFilename() {
-    return CONFIG_SETTINGS.get().registryTool.clientSecretFilename;
-  }
-
   /**
    * Memoizes loading of the {@link RegistryConfigSettings} POJO.
    *