e2e(studio): index advisor tests (supabase#41246)

* feat: initial index advisor one shot setup with cursor

* feat: more tests to check against

* fix: few selector and await checks

* fix: no flaky me likey

* fix: no type errors me likely

* chore: remove tests for index advisor banner

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Co-authored-by: Ali Waseem <waseema393@gmail.com>

Author: kemaldotearth