[TrafficController] CP proxy infra fixes

[williampsmith]

Description

CP https://github.com/MystenLabs/sui/pull/17854 and https://github.com/MystenLabs/sui/pull/18106 to run on rpc nodes in traffic controller dry run mode

Test plan

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Release notes

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

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