Add Api tokens counters to support api token index page

[CatalinVoineag]

Context

We want more information at a glace on the support API tokens page.

This PR will add a counter of all the API tokens for our provider and a counter of the tokens used in the last 3 mounths.

Changes proposed in this pull request

Support API token index page

Guidance to review

Things to check

• If the code removes any existing feature flags, a data migration has also been added to delete the entry from the database
• This code does not rely on migrations in the same Pull Request
• If this code includes a migration adding or changing columns, it also backfills existing records for consistency
• If this code adds a column to the DB, decide whether it needs to be in analytics yml file or analytics blocklist, if included inform data insights team of the changes
• If this code adds a column that may include PII, the sanitise.sql script and 0025-protecting-personal-data-in-production-dump.md ADR have been updated
• API release notes have been updated if necessary
• If it adds a significant user-facing change, is it documented in the CHANGELOG?
• Attach the PR to the Trello card

[CatalinVoineag]

Improve the "API Tokens" page in the Support Console to summarise information about API consumers

[elceebee]

Do we have any specs for this page? It might be good to have something basic in place if there isn't anything already.

[avinhurry]

I know this is just for internal use but it would be nice to have the boxes the same size