Move from zlib to zlib-ng

[AlexanderRichert-NOAA]

Summary

This PR moves from zlib to zlib-ng. Time to get with the times.

For now I'm not touching any of the templates.

Testing

Tested on Hera & personal machine. Successfully concretizes without zlib, and on Hera, the UFS WM deps build and RTs run successfully.

Applications affected

All

Systems affected

All

Dependencies

JCSDA/spack#409

Issue(s) addressed

#902

Checklist

• This PR addresses one issue/problem/enhancement, or has a very good reason for not doing so.
• These changes have been tested on the affected systems and applications.
• All dependency PRs/issues have been resolved and this PR can be merged.

[AlexanderRichert-NOAA]

Looks like at least the MacOS CI is still building regular zlib... https://github.com/JCSDA/spack-stack/actions/runs/8115572790/job/22183711124

Edit: Also Ubuntu: https://github.com/JCSDA/spack-stack/actions/runs/8115572792/job/22183711121?pr=1016

[edwardhartnett]

I actually thought we were already doing this.

In our testing ng-zlib was about 10% faster than zlib.

[climbfuji]

@AlexanderRichert-NOAA I finally started testing this PR together with #972 and JCSDA/spack#400

[climbfuji]

I tested this with a few JEDI-Skylab experiments and it works just fine. Thanks!