indexer JSON RPC: derive object changes instead

[gegaowp]

Description

Derive JSON RPC object changes based on sender_signed_data and effects, so that we do not have to store object_changes in the transactions table.

https://linear.app/mysten-labs/issue/DP-65/clean-up-object-changes-in-transactions

Test plan

How did you test the new or updated feature?

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Release notes

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• [ ] Protocol:
• [ ] Nodes (Validators and Full nodes):
• [ ] Indexer:
• [ ] JSON-RPC:
• [ ] GraphQL:
• [ ] CLI:
• [ ] Rust SDK:
• [ ] REST API: