Refactor and migrate AdminAPIKeys to TypeScript

Part of #5002. `web/components/AdminAPIKeys.js` is 565 lines holding two `PureComponent` classes, with `static propTypes = {}`, so nothing states what either component expects.

Blocked on #8172, so the E2E suite can be run after review rather than trusting the diff.

Split into PRs: drop the `AccountStore` dependency (#8175, ready, and needs no test net because it substitutes a value the component already receives); split `CreateAPIKey` and `AdminAPIKeys` into their own folders; migrate to TypeScript, which is smaller than it looks since there are no `data.*` calls and it already goes through RTK services; then optionally classes to functions with hooks, which is the piece that most wants the E2E net.

Found while looking: the edit path was not passing `organisationId`, so it leaned on the global store, which left `MyRoleSelect` with no organisation when editing a key. Fixed in #8175.