Move to MPT 2.28 at NAS

This release of ESMA_env updates MPT to 2.28 at NAS. This needed due to the transition to TOSS4 at NAS for all nodes.

Should be used with:

• ESMA_cmake v3.29.0
• GEOSgcm_App v2.1.2

as those also deal with the TOSS4 change at NAS

---

From CHANGELOG.md

Changed

• Updated to use MPT 2.28 at NAS per their recommendation for running on new TOSS4 nodes
  • This is done through the mpi-hpt/mpt module which resolves to mpi-hpe/mpt.2.28_25Apr23_rhel87

---

What's Changed

• Update to MPT 2.28 (Baselibs 7.12.0) by @mathomp4 in #95

Full Changelog: v4.15.0...v4.16.0