It is needed to be able to set common limits for chain client
Added a test for group tag limiter
Added a mutex to RPC limiter to change counters atomically
Replaced isConnected with atomic.Bool and made it a pointer to
be shared across client instances
Split ClientInterface to aggregation of multiple interfaces
Added tags to RPC stats API
Use tagged RPC client for transfers commands
Implemented general interface for RPC limiting
Ivan Belyakov
Sale Djenic