Updated Conda packages and channels to install cuda-toolkit and override 12.0 cuda packages requested by pytorch with their 11.7 equivalent.
Removed Conda installation since we can use the downloaded Micromamba.exe for the same purpose with a smaller footprint.
Removed redundant PATH changes.
Changed %gpuchoice% comparisons to be case-insensitive.
Added additional error handling and removed the use of .tmp files.
Added missing extension requirements.
Added GPTQ installation. Will attempt to compile locally and, if failed, will download and install a precompiled wheel.
Incorporated fixes from one-click-bandaid.
Fixed and expanded first sed command from one-click-bandaid.
libbitsandbytes_cudaall.dll is used here as the cuda116.dll used by one-click-bandaid does not work on my 1080ti. This can be changed if needed.
