[Feature]: Clean up and RELEASE the GameState API

[itsalaidbacklife]

Feature Summary

After all other issues in the GameState API MVP Project are completed, we should make the necessary changes to utilize the GameState API in production.

Detailed Description

Specifically, this will require:

1. Removing the feature flags scripts from package.json for enabling/disabling the GameState API
2. Reverting [Feature]: Update CI runs to test twice: with and without the USE_GAMESTATE_API feature flags #963 so that CI the tests only run once in CI (vs with + without the GameState API)
3. Removing all references to the SAILS_USE_GAMESTATE_API, VITE_USE_GAMESTATE_API, and CYPRESS_USE_GAMESTATE_API from frontend and test code such that app code + tests all use the GameState API all the time
4. Remove all the routes and controller files for the legacy api calls that are replaced by the GameState API endpoints
5. Clean up the endpoint callers to remove extraneous data e.g. opId everywhere it's used.

Note: Look for comments with // FIXME: Remove in #965 throughout the codebase to clean these up. For example:
src/stores/game.js: remove opId and targetId from requestResolveSevenDoubleJacks