Add a new option `--cuda` to `tools/nightly.py` to pull the nightly packages with CUDA support.
```bash
# installs pytorch-nightly with cpuonly
tools/nightly.py pull
# The following only available on Linux and Windows
# installs pytorch-nightly with latest CUDA we support
tools/nightly.py pull --cuda
# installs pytorch-nightly with CUDA 12.1
tools/nightly.py pull --cuda 12.1
```
Also add targets in `Makefile` and instructions in constribution guidelines.
```bash
# setup conda environment with pytorch-nightly
make setup-env
# setup conda environment with pytorch-nightly with CUDA support
make setup-env-cuda
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/131133
Approved by: https://github.com/ezyang
Enables two ruff rules derived from pylint:
* PLR1722 replaces any exit() calls with sys.exit(). exit() is only designed to be used in repl contexts as may not always be imported by default. This always use the version in the sys module which is better
* PLW3301 replaces nested min / max calls with simplified versions (ie. `min(a, min(b, c))` => `min(a, b. c)`). The new version is more idiomatic and more efficient.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/109461
Approved by: https://github.com/ezyang
