## Description 

Using a flat high timeouts in commit sync can stall fetching for too
long and hurt throughput, when slow hosts block fetching blocks for the
max timeout. Using timeouts that are too short can be problematic too.
Instead, start the request timeout at 10s and gradually increase it with
retries.

## Test plan 

CI
PT

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## Release notes

Check each box that your changes affect. If none of the boxes relate to
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any actions they must take to implement updates.

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