Implement `uv pip freeze --exclude` flag (#17045)
## Summary
Implements the `--exclude` flag to `uv pip freeze`, which allows to
filter unwanted dependencies from the resulting requirements.txt file.
```bash
uv pip freeze --exclude pandas
```
part of https://github.com/astral-sh/uv/issues/3141
## Test Plan
Unit test with simple exclusion example of command argument(s)
