Update AutoGluon to use uv during setup.sh

[Innixma]

• Update AutoGluon to use uv instead of pip for installation in setup.sh This aligns with mainline AutoGluon now switching to uv for its install instructions.

• The switch to uv reduces AutoGluon installation time from ~10 minutes to ~40 seconds on EC2. This also avoids a bug in pip where it fails to install AutoGluon.

• Removed setuptools and wheel installs, as they aren't needed by uv and there is a bug in torch 1.4.x that causes an exception if setuptools is installed at the same time.

• Will now install from source in non-editable mode. Previously it would install in editable mode, which could cause bugs if running AMLB locally alongside a pre-existing local AutoGluon install. This is now avoided by ensuring that the venv directly uses the code pulled in setup.sh.

[PGijsbers]

Sorry for the delay. I wanted to try it out locally to understand where uv installs its packages if created from a virtual environment to ensure the normal cleanup instructions are still valid. It behaves as I expected so we're good to go :)