Improve build time

[G-D-Petrov]

• Fix compilation errors with clang-18 due to Werror
• Run include-what-you-use to reduce includes and add forward declarations

Test building on ec2

Set upper limit for build threads in benchmark flow

Revert change

Reference Issues/PRs

What does this implement or fix?

Any other comments?

Checklist

Checklist for code changes...

• [ ] Have you updated the relevant docstrings, documentation and copyright notice?
• [ ] Is this contribution tested against all ArcticDB's features?
• [ ] Do all exceptions introduced raise appropriate error messages?
• [ ] Are API changes highlighted in the PR description?
• [ ] Is the PR labelled as enhancement or bug so it appears in autogenerated release notes?