Update emeris grpc/lcd urls to new structure

as per this ticket:
EmerisHQ/infra#11

sample staging addresses for osmosis chain:

**🚨NOTE:🚨**: addresses are split between chains, so make sure to create a mechanism that chooses proper address based on the network
```
https://api.osmosis.chain.staging.demeris.io/
https://grpc.osmosis.chain.staging.demeris.io/
```