Is there a way to bulk edit env variables all at once

### Before opening, please confirm:

- [X] I have checked to see if my question is addressed in the [FAQ](https://github.com/aws-amplify/amplify-hosting/blob/master/FAQ.md).
- [X] I have [searched for duplicate or closed issues](https://github.com/aws-amplify/amplify-hosting/issues?q=is%3Aissue+).
- [X] I have read the guide for [submitting questions](https://github.com/aws-amplify/amplify-hosting/blob/master/CONTRIBUTING.md).
- [X] I have removed any sensitive information from my code snippets and submission.

### App Id

NEW_APP

### AWS Region

us-east-1

### Amplify Hosting feature

Environment variables

### Question

Is there any other way to edit environment variables in a batch instead of manually enter the overrides through Settings > Environment Variables via AWS Amplify Console?
I am asking this is because we found whenever we toggle on/off the CI/CD for backend environment pointing, the already set-up environment variables are completely cleared out. After repeating the manual process which in our case, we have around 10 branches for 20 environment variables. To have a feature like edit the environment variables in a YML file would be extremely helpful.

Start by reviewing FAQ.md and the AWS Amplify Console Settings > Environment Variables workflow described in the issue. Investigate how environment variables are handled when CI/CD backend environment pointing is toggled and whether a YAML-based or other batch-edit entry point exists. Done means defining and validating a supported way to update variables across the reported branches without losing existing values.

Written by the indexing model from the issue text.