refactor: replace block numbers subgraph with a service

[gmbronco]

removing dependency on SG.

needed methods:

// Datastudio, MasterChef
async getBlocksPerDay() {},
// Used by reliquary-snapshot.service.ts, upsertFarmSnapshots
async getBlockForTimestamp(timestamp: number) {},
// Used for getting missing snapshots for pools that aren't covered by subgraph, e.g. composable or nested
// Not needed, look into the snapshots service and remove the dependent parts as well.
// Returns block every 24h for a number of days
async getDailyBlocks() {},