feat: make use of abstract consumer API

[navinkarkera]

Description: Removes local consume_events command and instead makes use of new abstract consumer API and the command from openedx-events to start a worker.

JIRA: Private-ref: BB-7240

Issue: openedx/openedx-events#147

Dependencies: openedx/openedx-events#200

Merge deadline: List merge deadline (if any)

Installation instructions: and Testing instructions:

Follow instructions from readme. The consume_events command is provided by openedx-events and the RedisEventConsumer is loaded from test_settings.EVENT_BUS_CONSUMER.

Reviewers:

• @kaustavb12
• @bmtcril

Merge checklist:

• All reviewers approved
• CI build is green
• Version bumped
• Changelog record added
• Documentation updated (not only docstrings)
• Commits are squashed

Post merge:

• Create a tag
• Check new version is pushed to PyPI after tag-triggered build is
  finished.
• Delete working branch (if not needed anymore)

Author concerns: List any concerns about this PR - inelegant
solutions, hacks, quick-and-dirty implementations, concerns about
migrations, etc.

[openedx-webhooks]

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[kaustavb12]

👍

• I tested this: Followed testing instruction
• I read through the code
• I checked for accessibility issues
• Includes documentation
• I made sure any change in configuration variables is reflected in the corresponding client's configuration-secure repository.

[mphilbrick211]

Hi @navinkarkera! Is this PR ready for review/merge?

[navinkarkera]

@mphilbrick211 Thanks for checking. This MR is dependent on openedx/openedx-events#200, so I'll update and ping once it is ready.

[navinkarkera]

@bmtcril This is ready to be merged. We will need to release our first version to pypi in order to make use of this library in openedx and discovery.

PS: I have also made the consumer argument required.

[bmtcril]

Thanks, looks good! I'll make a release now 🤞

[openedx-webhooks]

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

[navinkarkera]

@bmtcril Thanks!!