[MICROBA-1075]
- Adds a new `edx.certificate.revoked` event to the LMS.
- Refactor of our certificate revocation functions in the GeneratedCertificate model.
This new event will be emit when a GeneratedCertificate with the status of `downloadable` is revoked (through the `invalidate(), mark_notpassing(), or mark_unverified() functions). Event will have a `source` field that will allow us how our certificates are being revoked from learners and can be broken down in the following way:
*Invalidate*
- allowlist_removal
- certificate_generation
- certificate_regeneration
- certificate_service
- certificate_invalidation_list
- bulk_certificate_regeneration
*mark_notpassing*
- certificate_generation
- notpassing_signal
*unverified*
- certificate_generation
[MB-1077]
- Stop removing the verify_uuid when revoking course certificates. In v2 of course certificates this will allow us to retain the same URL to the certificate. If a learner's certificate is revoked (from being invalidated or no longer passing the course) the UUID will remain intact and the URL will not change.
- Look for an existing cert for the user in a course-run during generation. If one exists, use the UUID from the existing certificate when updating the record.
- Stop generating a `key` for v2 web-certificates. This is not needed for web-certs (this is used in PDF cert generation).
* Generate common/djangoapps import shims for LMS
* Generate common/djangoapps import shims for Studio
* Stop appending project root to sys.path
* Stop appending common/djangoapps to sys.path
* Import from common.djangoapps.course_action_state instead of course_action_state
* Import from common.djangoapps.course_modes instead of course_modes
* Import from common.djangoapps.database_fixups instead of database_fixups
* Import from common.djangoapps.edxmako instead of edxmako
* Import from common.djangoapps.entitlements instead of entitlements
* Import from common.djangoapps.pipline_mako instead of pipeline_mako
* Import from common.djangoapps.static_replace instead of static_replace
* Import from common.djangoapps.student instead of student
* Import from common.djangoapps.terrain instead of terrain
* Import from common.djangoapps.third_party_auth instead of third_party_auth
* Import from common.djangoapps.track instead of track
* Import from common.djangoapps.util instead of util
* Import from common.djangoapps.xblock_django instead of xblock_django
* Add empty common/djangoapps/__init__.py to fix pytest collection
* Fix pylint formatting violations
* Exclude import_shims/ directory tree from linting
