feat: search and reset redis limiter keys

[k9ert]

If a user tries to login with his phone-number too often, he gets blocked via an entry in redis of the form: login_attempt_id:+192828282

However if the user asks in support to get unblocked, this is currently not yet possible. We'll need an admin-panel PR for that but we also need a admin-api endpoint which enables that.

So this PR:

• Creates two admin-endpoints to search and remove limiter based redis-keys (and ONLY limiter based redis keys)
• Adds two scripts to easily get access to the local dev admin-api
• adds the redis cli to flake.nix
• add some tests

# For unit tests
buck2 run //core/api:unit-tests -- --testPathPattern="reset-rate-limit"

# For integration tests  
buck2 run //core/api:test-integration -- --testPathPattern="reset-rate-limit"

[dolcalmi]

check this keybase://chat/blinkbtc#dev/1819