Re-organize structure of ex-script for forecast task

[chan-hoo]

Description

• Re-organize the structure of the ex-scripts for the forecast task to remove the direct use of the scripts of the ufs-weather-model.
• Clean up some unnecessary lines.
• Change the paths to the fix files in the input data directory.

Anticipated changes to regression tests:

• [ ] Is baseline change expected ?

Subcomponents involved:

• [ ] apply_incr.fd (NOAA-PSL/land-apply_jedi_incr)
• [ ] ufsLand.fd (NOAA-EPIC/ufs-land-driver-emc-dev)
• [ ] ufs_model.fd (ufs-community/ufs-weather-model)
• [ ] vector2tile_converter.fd (NOAA-PSL/land-vector2tile)
• [x] none

Linked PR's and Issues:

Resolve Issue #120

Testing (for CM's):

• RDHPCS
  • [x] Hera
  • [x] Orion
  • [ ] Hercules
  • [ ] Derecho
• CI
  • [x] Completed
• PW-Clouds
  • [ ] AWS
  • [ ] AZURE
  • [ ] GCP

[chan-hoo]

On Hera:

    Start 1: test_vector2tile
1/7 Test #1: test_vector2tile .................   Passed    2.18 sec
    Start 2: test_create_ens
2/7 Test #2: test_create_ens ..................   Passed    2.81 sec
    Start 3: test_letkfoi_snowda
3/7 Test #3: test_letkfoi_snowda ..............   Passed    5.80 sec
    Start 4: test_apply_jediincr
4/7 Test #4: test_apply_jediincr ..............   Passed    2.23 sec
    Start 5: test_tile2vector
5/7 Test #5: test_tile2vector .................   Passed    2.93 sec
    Start 6: test_land_driver
6/7 Test #6: test_land_driver .................   Passed    9.08 sec
    Start 7: test_ufs_datm_land
7/7 Test #7: test_ufs_datm_land ...............   Passed   53.40 sec

100% tests passed, 0 tests failed out of 7

Total Test time (real) =  78.47 sec

[chan-hoo]

On Orion:

    Start 1: test_vector2tile
1/7 Test #1: test_vector2tile .................   Passed    3.67 sec
    Start 2: test_create_ens
2/7 Test #2: test_create_ens ..................   Passed    3.57 sec
    Start 3: test_letkfoi_snowda
3/7 Test #3: test_letkfoi_snowda ..............   Passed   48.77 sec
    Start 4: test_apply_jediincr
4/7 Test #4: test_apply_jediincr ..............   Passed    3.63 sec
    Start 5: test_tile2vector
5/7 Test #5: test_tile2vector .................   Passed    4.17 sec
    Start 6: test_land_driver
6/7 Test #6: test_land_driver .................   Passed   17.36 sec
    Start 7: test_ufs_datm_land
7/7 Test #7: test_ufs_datm_land ...............   Passed  487.22 sec

100% tests passed, 0 tests failed out of 7

Total Test time (real) = 568.45 sec