Improve error granularity

[sam0x17]

Right now a lot of the errors returned by subtensor extrinsics are fairly generic substrate errors. We want these to be as granular / descriptive as possible, so an audit of what errors we are returning should be conducted and we should create new error types and/or utilize existing descriptive ones wherever possible

A/C:

• [ ] review the errors we currently return
• [ ] add new errors and/or replace generic errors with specific ones
• [ ] coordinate with @opentensor/cortex to make sure bittensor is ready for these changes
• [ ] profit?

[RomanCh-OT]

I have already implemented the logic for retrieving error data (name and description) from SubstrateInterface metadata. However, we don't know if all errors on the Subtensor side return an error number/index.

Here is the card associated with this implementation.