Acorn/WCOSS2/NCO updates

[AlexanderRichert-NOAA]

Description

Config updates for Acorn/WCOSS2. No changes to common configs. repos/builtin/ update has updated harfbuzz & pango package.py's (ensures harfbuzz is built with gobject so pango build doesn't fail).
This PR also fixes setup.sh so that it can be fully run from outside of the spack-stack directory structure.

Dependencies

• Harfbuzz updates for WCOSS2/NCO spack-packages#30

Issues addressed

Part of #1835 (v2 release)

Applications affected

EMC apps (+anyone using harfbuzz..?)

Systems affected

Acorn, WCOSS2; all are affected by setup.sh modification

Testing

• CI: Note whether the automatic tests (GitHub actions tests that run automatically for every commit) pass or not
  • GitHub actions CI tests pass
• Additional testing: Add information on any additional tests conducted
  • modifications were tested on top of develop by installing all acorn deployments
  • concretization+validation verified on top of release/2.0 (this branch) on acorn

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.
• All necessary updates to the documentation on readthedocs are included in this PR
• All necessary updates to the spack-stack wiki will be made when this PR is merged