[Issue #2470] Removes deprecated analytics code

[widal001]

Summary

Removes deprecated analytics code after replacing it with new GitHub export pattern and dataset.

Note: This PR is stacked on #2710 and needs to either be merged into #2710 before that PR is merged or rebased on main after that PR is merged. ✅ Done.

Fixes #2470

Time to review: 5 mins

Changes proposed

What was added, updated, or removed in this PR.

• Removes SprintBoard and DeliverableTask datasets
• Removes CLI entry points for the old method of exporting issue and project data:
  • poetry run analytics export issue_data
  • poetry run analytics export project_data
• Removes code in analytics/integrations/github/main.py for these old export patterns
• Updates documentation/analytics/usage.md and documentation/analytics/development.md to remove references to the old patterns
• Cleans up targets in Makefile

Context for reviewers

Testing instructions, background context, more in-depth details of the implementation, and anything else you'd like to call out or ask reviewers. Explain how the changes were verified.

1. Follow the installation instructions in /documentation/analytics/development.md including the instructions to set Slack environment variables (use the #z_bot-analytics-ci-test channel)
2. Run make sprint-reports-with-latest-data
3. Check the output in #z_bot-analytics-ci-test

Additional information

Screenshots, GIF demos, code examples or output to help show the changes working as expected.

The results posted to slack should look like this:

[widal001]

Something wonky happened with the attempted rebase on #2710, I'll be fixing this shortly!

[widal001]

Successfully rebased on #2710, will rebase against main after that PR is merged.

The base branch was changed.

[widal001]

Rebase on main after merging #2710

[widal001]

Here are the posts from the test run after rebasing on main and here's the view from the command line: