- [Cherry pick] Tweak some knobs for execution time estimation (#22331)
- [Cherry pick] Share new execution time observations unidirectionally
(#22338)
- [Cherry-pick] Increase utilization target and burst limit

## Description 

Describe the changes or additions included in this PR.

## Test plan 

How did you test the new or updated feature?

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## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [x] Protocol: Congestion control settings have been adjusted
- [ ] Nodes (Validators and Full nodes): 
- [ ] gRPC:
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

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Co-authored-by: Andrew Schran <aschran@mystenlabs.com>