Remove summary table from report dashboard

[jazairi]

Why these changes are being introduced:

The report summary table is extremely inefficient.

Relevant ticket(s):

• ETD-623

How this addresses that need:

This removes the summary table, so the report
index view just lists links to the individual
reports.

Stakeholders have noted that the summary tables
are useful, so this is an intermediary step
toward a functional version.

Side effects of this change:

• Link sidebar is now redundant, but we intend to
  reintroduce the summary table in a more efficient
  form, so it makes sense to leave it in for now.
• The report dashboard is now a visual design
  abomination, but that feels better than a million
  N+1 queries.

Developer

• All new ENV is documented in README
• All new ENV has been added to Heroku Pipeline, Staging and Prod
• ANDI or Wave has been run in accordance to
  our guide and
  all issues introduced by these changes have been resolved or opened as new
  issues (link to those issues in the Pull Request details above)
• Stakeholder approval has been confirmed (or is not needed)

Code Reviewer

• The commit message is clear and follows our guidelines
  (not just this pull request message)
• There are appropriate tests covering any new functionality
• The documentation has been updated or is unnecessary
• The changes have been verified
• New dependencies are appropriate or there were no changes

Requires database migrations?

NO

Includes new or updated dependencies?

NO

[jazairi]

I'd like to check with Wilder about whether they use the report summary, and they're out sick today. Will tag for review when I have confirmation that the table isn't needed.

[coveralls]

coverage: 98.286% (-0.002%) from 98.288% — etd-623 into main

[jazairi]

Mikki would like the report summary to include the past four terms. This is ticketed here, but I think we should still land this PR in the meantime so the route isn't broken.