feat: Publish mobile SKUs to LMS

[moeez96]

⛔️ DEPRECATION WARNING

This repository is deprecated and in maintainence-only operation while we work on a replacement, please see this announcement for more information.

Although we have stopped integrating new contributions, we always appreciate security disclosures and patches sent to [email protected]

Anyone internally merging to this repository is expected to release and monitor their changes; if you are not able to do this DO NOT MERGE, please coordinate with someone who can to ensure that the changes are released.

Required Testing

• Before deploying this change, complete a purchase in the stage environment.
  (^ We can remove that manual check once REV-2624 is done and the corresponding e2e test runs again)

Description

This PR adds to changes to the publishing of seats of a course to the LMS as Course modes:

1. Do not include mobile seats while serializing course seats to be published as course modes in LMS.
2. Add mobile SKUs value in serialized seat.

Supporting information

Jira ticket: https://2u-internal.atlassian.net/browse/LEARNER-9682
Supporting LMS PR: openedx/edx-platform#33754

Testing instructions

1. Create verified mobile seats for a course and add SKU in the mobile seats prefixed with 'mobile.android.' and 'mobile.ios.'
2. Enter ecommerce shell on local and publish the course you created the seat for.
3. Verify in the debugger that SKUs are added to the serialized data sent to the LMS. SKU values will be added in the verified seat serialized JSON, while the audit seat will have None values for mobile SKUs.

[zubair-ce07]

LGTM. We will need to take care of price_excl_tax field as in latest django-oscar version it is renamed to price. But for now its 👍