Close migration for Pytorch 2.3

[regro-cf-autotick-bot]

This PR has been triggered in an effort to update the pin for pytorch. The current pinned version is 2.1, the latest available version is 2.3 and the max pin pattern is x.x. This migration will impact 39 feedstocks.

Checklist:

• The new version is a stable supported pin.
• I checked that the ABI changed from 2.1 to 2.3.

**Please note that if you close this PR we presume that the new pin has been rejected.

@conda-forge-admin please ping pytorch-cpu
This PR was generated by - please use this URL for debugging.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-webservice.

I was asked to ping @conda-forge/pytorch-cpu and so here I am doing that.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-webservice.

I was asked to ping @conda-forge/pytorch-cpu and so here I am doing that.

[hmaarrfk]

I hijacked this PR to close the migration instead.

Any objections @h-vetinari you've been helping tremendously on this front!

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-webservice.

I was asked to ping @conda-forge/pytorch-cpu and so here I am doing that.

[h-vetinari]

OK, let's summarize:

• Rebuild for pytorch 2.3 autoawq-feedstock#7: blocked on a pip check due to wrong metadata in third-party dep
• Rebuild for pytorch 2.3 fairscale-feedstock#34: not compatible with pytorch >=2
• Rebuild for pytorch 2.3 kaolin-feedstock#24: waiting for feedback from @jakirkham on precursor
• Rebuild for pytorch 2.3 pixsfm-feedstock#20: many open PRs on that feedstock
• Rebuild for pytorch 2.3 torchsparse-feedstock#35: not compatible with pytorch >=2 (AFAIU)

All in all, good to go!