Update netgen to build on macOS for Apple Silicon

[oursland]

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

This branch bumps up the version of netgen to 6.2.2302 which includes support for building on Apple Silicon. Separate directives for the deployment target and build machine are specified to support building on and for both x86_65 and arm64 macOS.

A migration to support python3.11 is included to support the most recent build.

Closes #45

[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.

I do have some suggestions for making it better though...

For recipe:

• Old-style Python selectors (py27, py34, py35, py36) are deprecated. Instead, consider using the int py. For example: # [py>=36]. See lines [18]
• License is not an SPDX identifier (or a custom LicenseRef) nor an SPDX license expression.

Documentation on acceptable licenses can be found here.

[jakirkham]

Added a note in the OP to close out the macOS ARM migrator PR (since this does that work already)

[mikemhenry]

I think you wanted to import netgen and not pymbar 🙃

[looooo]

To build for osx-arm you need to add this line and render:
https://github.com/conda-forge/pivy-feedstock/blob/main/conda-forge.yml#L3

[looooo]

Just in case you don't know. For freecad Netgen is bundled with smesh:
https://github.com/trelau/SMESH/blob/master/.gitmodules#L1

[oursland]

Just in case you don't know. For freecad Netgen is bundled with smesh: https://github.com/trelau/SMESH/blob/master/.gitmodules#L1

I see. I had issues on some builds in loading the FEM examples and figured it was due to the CMake not finding netgen. I have confirmed that without netgen the builds operate correctly.