chore(amplify-provider-awscloudformation): reduce log level (#7864)

since cfn-lint is deprecated, it does not always proper validate cloudformation. we've made validation errors non-blocking already in [#7132](#7132). This commit also addresses the log level so as not to confuse customers with a red error message.

#7831

packages/amplify-provider-awscloudformation/src/push-resources.ts

@@ -538,7 +538,7 @@ function validateCfnTemplates(context: $TSContext, resourcesToBeUpdated: $TSAny[
       try {
         validateFile(filePath);
       } catch (err) {
-        context.print.error(`Invalid CloudFormation template: ${filePath}${EOL}${err.message}`);
+        context.print.warning(`Invalid CloudFormation template: ${filePath}${EOL}${err.message}`);
       }
     }
   }