Feat/txindex

[rdeioris]

Description

This is a reengineering of #5484 based on feedbacks from both the initial code review and nakamoto meetings.

In this first draft it just covers the infrastructure for adding a new "txindex" (boolean) option in the node config and deprecation of the old STACKS_TRANSACTION_LOG environment variable.

This option injects into the nakamoto coordinator and adds a parameter to NakamotoChainState::process_next_nakamoto_block enabling/disabling the record of a transaction.

Note that enabling both txindex and STACKS_TRANSACTION_LOG will trigger an error on startup prevending the system to enable both.

Once this first draft is approved i will add back the rpc endpoints features (that should be way more simple now)

Applicable issues

• fixes Add additional GET RPC endpoints #4358

Additional info (benefits, drawbacks, caveats)

Checklist

• Test coverage for new or modified code paths
• Changelog is updated
• Required documentation changes (e.g., docs/rpc/openapi.yaml and rpc-endpoints.md for v2 endpoints, event-dispatcher.md for new events)
• New clarity functions have corresponding PR in clarity-benchmarking repo
• New integration test(s) added to bitcoin-tests.yml