WIP - balances cache

[rafal-ch]

Linked Issues/PRs

Partially closes #1965

Description

• New Balances database
• Update the "coins" in the new database on each processed event
• The balance GraphQL query uses the new database to return the balance
  • this is enabled now just for testing purposes, until the migration is completed we should keep using the classic method of counting the balance

Plus some throw away hacks that will be dismissed when the proper migration code is done:

1. replace_forced() in off chain DB, that uses the new StorageMutateForced trait
2. migration of the DB metadata from V1 to V2 which contains the indexation progress

Checklist

• Breaking changes are clearly marked as such in the PR description and changelog
• New behavior is reflected in tests
• The specification matches the implemented behavior (link update PR if changes are needed)

Before requesting review

• I have reviewed the code myself
• I have created follow-up issues caused by this PR and linked them here

After merging, notify other teams

[Add or remove entries as needed]

• Rust SDK
• Sway compiler
• Platform documentation (for out-of-organization contributors, the person merging the PR will do this)
• Someone else?

[rafal-ch]

Closed in favor of #2383