Sentry SDK version bump, integrations adding and Sentry release workflow

[ks129]

Relevant Issues

Approved in #dev-core.

Description

• Bumped Sentry SDK version from 0.14 to 0.19.
• Added Redis and aiohttp integrations to Sentry SDK initializing.
• Added workflow for creating Sentry releases (based on site's one).

Did you:

• Join the Python Discord Community?
• If dependencies have been added or updated, run pipenv lock?
• Lint your code (pipenv run lint)?
• Set the PR to allow edits from contributors?

[jb3]

We should really be initialising the Sentry SDK with the release label. I think @lemonsaurus implemented this on site so we should look there for how the SHA is fetched (we can either use a .git folder or inject the SHA into the Docker build, I think I prefer the latter) and passed into the Sentry SDK.