[Relayer] refactor: simplify RelayerSessionsManager

[bryanchriswhite]

Summary

Human Summary

(See the AI summary, it's actually decent)

AI Summary

Summary generated by Reviewpad on 09 Nov 23 20:17 UTC

This pull request includes the following changes:

• Added a new function MapExpand in the pkg/observable/channel/map.go file, which transforms the given observable by applying a transform function to each notification received from the observable and returns a slice of output notifications for each input notification.
• Updated the import statement in the pkg/relayer/session/session.go file to use the renamed package github.com/pokt-network/poktroll/pkg/client.
• Updated the type declaration of the blockClient field in the relayerSessionsManager struct in the pkg/relayer/session/session.go file to use the new type client.BlockClient.
• Updated the initialization of the sessionsToClaim field in the NewRelayerSessions function in the pkg/relayer/session/session.go file to use the new MapExpand function.
• Added a new mapBlockToSessionsToClaim function in the relayerSessionsManager struct in the pkg/relayer/session/session.go file, which maps a block to a list of sessions that can be claimed as of that block.

Issue

• #{ISSUE_NUMBER}

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Type of change

Select one or more:

• New feature, functionality or library
• Bug fix
• Code health or cleanup
• Documentation
• Other (specify)

Testing

• Run all unit tests: make go_develop_and_test
• Verify Localnet manually: See the instructions [here](TODO: add link to instructions)

Sanity Checklist

• I have tested my changes using the available tooling
• I have performed a self-review of my own code
• I have commented my code, updated documentation and left TODOs throughout the codebase

[Olshansk]

(See the AI summary, it's actually decent)

😆

[Olshansk]

Minor changes for requests but should be quick

[Olshansk]

Thank you for making the changes!