* Replace Beethoven X subgraph url and add a test * Simplify PoolsCacheMap type * Make `BalancerV2PoolsCache` optional for Beethoven X * Update CHANGELOG.json
* Replace Beethoven X subgraph url and add a test * Simplify PoolsCacheMap type * Make `BalancerV2PoolsCache` optional for Beethoven X * Update CHANGELOG.json