chore: provide logo url from backend for batch enrollment email

[mudassir-hafeez]

Ticket for internal tracking

https://github.com/mitodl/hq/issues/4923

Description

For the past couple of years, edX has supported a logo URL from the backend for Bulk Email and edX ACE emails. But, this does not have similar support for emails using batch enrollment. Not sure if it is intentional or could have some other reasons but it causes the logo URL to be missed if it needs to be passed from the backend similar to Bulk Email and edX ACE emails.

This pull request addresses the logo not appearing in batch enrollment emails when the logo URL is set in the backend and accessed in the template(or custom theme) similar to how edX Bulk or ACE email use.

Useful information to include:

• No UI changes were made, so no screenshots are necessary.

Supporting information

• Related pull request in edX platform.

Testing instructions

• Ensure that LOGO_URL_PNG_FOR_EMAIL or any of the settings accessed in this code is set.
• Go to the Membership tab in the Instructor Dashboard with a user having staff access.
• Send a Batch Enrollment or Batch Beta Tester email.
• Verify that the logo appears correctly in the email.

Other information

• This change is isolated to the email template logic and does not depend on other changes.
• No database migrations are involved.

[openedx-webhooks]

Thanks for the pull request, @mudassir-hafeez!

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[e0d]

Your branch is behind the base. I've pulled in changes from master as a merge commit which will update your branch and cause the tests to be re-run.

[mudassir-hafeez]

@e0d, thanks for merging the changes to update my branch and re-run the tests. It seems the commit linting job is failing. I'll fix it and rebase with the upstream master. However, this will require the tests to be re-run.

[e0d]

@mudassir-hafeez running now.

[ziafazal]

👍

[openedx-webhooks]

@mudassir-hafeez 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX staging environment in preparation for a release to production.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX production environment.