Add support for benchmarking `uv sync` and `uv lock` (#5524)
## Summary
This PR adds support for `uv lock` and `uv sync` in the standardized
benchmarks script.
Part of: https://github.com/astral-sh/uv/issues/5263.
## Test Plan
For example:
```sh
python scripts/bench/__main__.py --uv-project --benchmark resolve-cold ./scripts/requirements/trio.in --verbose
```
