Use ACCESS-NRI/UM7 for the um7 Spack package

[penguian]

Closes #137

Testing spack install successfully resulted in the creation of an executable:

$ spack install um7@access-esm1.5%intel@19.0.3.199 arch=linux-rocky8-x86_64_v4
[+] /usr (external glibc-2.28-mqjolvbeskcnhz5chvtdshk4x4sfnycs)
==> openmpi@4.1.0 : has external module in ['openmpi/4.1.0']
[+] /apps/openmpi/4.1.0 (external openmpi-4.1.0-zu2hmm5cqosdadfxpckiaawc7iy3hv3k)
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/pkgconf-2.2.0-ugenh6g4dnhti4p6ktbkfku6pzlq5fkr
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/fcm-2021.05.0-q2lzrtveje4vtlljpthvpqhszkh3heen
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/zlib-ng-2.1.6-h45fvywj47wc4uwa37mfzkdsqrgcqxux
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/dummygrib-1.0-qy5w2d7tmsbmvnqng2xlopdkd4m2grvb
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/gcom4-access-esm1.5-kh676l4utoyw5bcw2hxxhcsg4ysg3sfu
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/hdf5-1.10.11-v2zfowxbrnxqqfkvnr5tle7n7p2vacnh
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/netcdf-c-4.7.4-3nmf7akxujdumwtxbpeh6u4blz7ymera
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/netcdf-fortran-4.5.2-ykkd5uhfgaz5yoex4stn5k5zev2sy3aa
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/oasis3-mct-access-esm1.5-bt4ovriis7gg377wdzoqtxatcb437f5c
==> Installing um7-access-esm1.5-3f4l6xodludd4mdgsgrnfmevwpbd5cak [12/12]
==> No binary for um7-access-esm1.5-3f4l6xodludd4mdgsgrnfmevwpbd5cak found: installing from source
==> No patches needed for um7
==> um7: Executing phase: 'edit'
==> um7: Executing phase: 'build'
==> um7: Executing phase: 'install'
==> um7: Successfully installed um7-access-esm1.5-3f4l6xodludd4mdgsgrnfmevwpbd5cak
  Stage: 11.22s.  Edit: 0.02s.  Build: 8m 6.15s.  Install: 0.12s.  Post-install: 0.46s.  Total: 8m 19.56s
[+] /g/data/tm70/pcl851/src/ACCESS-NRI/release/linux-rocky8-x86_64_v4/intel-19.0.3.199/um7-access-esm1.5-3f4l6xodludd4mdgsgrnfmevwpbd5cak

[penguian]

Merging.