[develop] Replace existing UW CLI with UW API calls to template

[elcarpenterNOAA]

DESCRIPTION OF CHANGES:

This PR continues the integration of the uwtools package by replacing current use of the UW CLI with UW API calls in Python scripts. These changes are limited to the UW template tool.

Type of change

• [x] New feature (non-breaking change which adds functionality)

TESTS CONDUCTED:

• [ ] hera.intel
• [ ] orion.intel
• [ ] hercules.intel
• [ ] cheyenne.intel
• [ ] cheyenne.gnu
• [ ] derecho.intel
• [ ] gaea.intel
• [ ] gaeac5.intel
• [x] jet.intel
• [ ] wcoss2.intel
• [ ] NOAA Cloud (indicate which platform)
• [ ] Jenkins
• [x] fundamental test suite
• [ ] comprehensive tests (specify which if a subset was used)

DEPENDENCIES:

n/a

DOCUMENTATION:

None. UW Documentation is up-to-date.

CHECKLIST

• [x] My code follows the style guidelines in the Contributor's Guide
• [x] I have performed a self-review of my own code using the Code Reviewer's Guide
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] My changes need updates to the documentation. I have made corresponding changes to the documentation
• [x] My changes do not require updates to the documentation (explain).
• [x] My changes generate no new warnings
• [x] New and existing tests pass with my changes
• [x] Any dependent changes have been merged and published

[MichaelLueken]

The Jenkins tests have successfully completed on Derecho, Gaea, Hera GNU, Hera Intel, and Hercules. The Jet tests were manually run and all successfully passed:

----------------------------------------------------------------------------------------------------
Experiment name                                                  | Status    | Core hours used 
----------------------------------------------------------------------------------------------------
community_20240425200459                                           COMPLETE              17.65
custom_ESGgrid_20240425200500                                      COMPLETE              24.92
custom_ESGgrid_Great_Lakes_snow_8km_20240425200501                 COMPLETE              20.71
custom_GFDLgrid_20240425200503                                     COMPLETE              10.07
get_from_HPSS_ics_FV3GFS_lbcs_FV3GFS_fmt_nemsio_2021032018_202404  COMPLETE               8.07
get_from_HPSS_ics_FV3GFS_lbcs_FV3GFS_fmt_netcdf_2022060112_48h_20  COMPLETE              88.64
get_from_HPSS_ics_RAP_lbcs_RAP_20240425200505                      COMPLETE              15.86
grid_RRFS_AK_3km_ics_FV3GFS_lbcs_FV3GFS_suite_HRRR_20240425200506  COMPLETE             619.54
grid_RRFS_CONUS_13km_ics_FV3GFS_lbcs_FV3GFS_suite_GFS_v16_plot_20  COMPLETE              64.13
grid_RRFS_CONUS_25km_ics_FV3GFS_lbcs_FV3GFS_suite_GFS_v15p2_20240  COMPLETE               7.40
grid_RRFS_CONUS_3km_ics_FV3GFS_lbcs_FV3GFS_suite_RRFS_v1beta_2024  COMPLETE             919.70
----------------------------------------------------------------------------------------------------
Total                                                              COMPLETE            1796.69

Due to the continued degraded state of Orion and the additional maintenance today following the cooling issue that was encountered Wednesday night - Thursday morning, the Orion tests will not be run.