feat: import event-sink-clickhouse plugin

[Ian2012]

Description

This PR imports the code from the openedx-event-sink-clickhouse repository.

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[pomegranited]

👍

• I tested this on my tutor dev stack by overriding this setting from Aspects, and testing to make sure events still appear in Superset as expected:

  OPENEDX_EXTRA_PIP_REQUIREMENTS:
  - git+https://github.com/openedx/platform-plugin-aspects.git@cag/import-sink#egg=platform_plugin_aspects
  - "edx-event-routing-backends==v8.1.1"
  

• I skimmed through the code -- didn't read in detail since this is just a copy-over.
• I checked for accessibility issues N/A
• Includes documentation
• User-facing strings are extracted for translation

[bmtcril]

Looks good once the conflicts are resolved 👍

[openedx-webhooks]

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