Add decomp_init testlist and some extra PE layouts for some grids

[ekluzek]

Description of changes

Add a new testlist decomp_init and add some extra PE layouts for: ne120 and mpasa15

Specific notes

Contributors other than yourself, if any: John Dennis

CTSM Issues Fixed (include github issue #):
Fixes #3312

Are answers expected to change (and if so in what way)? No

Any User Interface Changes (namelist or namelist defaults changes)?
Allows ne120 and mpas15 grids to have additional PE layout "sizes": XL, L, M, S, XS for ne120, and L, S, XS for mpasa15

Does this create a need to change or add documentation? Did you do so? No n/a

Testing performed, if any: ran decomp_init testlist

IMPORTANT NOTE: This DOES CHANGE ANSWERS for the one self-test.
I should have caught this and as such shouldn't have merged to b4b-dev.
But, this self-test is a different beast and changes to answers there don't really matter.

The test that changes is:

    SMS_D_Ln1.f10_f10_mg37.I2000Clm50BgcCropQianRs.derecho_intel.clm-run_self_tests

 The fields that change are:

 RMS lndImp_Fall_evap                 4.0408E-06            NORMALIZED  1.8816E-01
 RMS lndImp_Fall_lat                  1.1481E+01            NORMALIZED  1.8864E-01
 RMS lndImp_Fall_lwup                 8.1192E+00            NORMALIZED  3.0125E-02
 RMS lndImp_Fall_sen                  3.0676E+01            NORMALIZED  4.1299E-01
 RMS lndImp_Fall_swnet                1.2477E+00            NORMALIZED  1.0133E-02
 RMS lndImp_Fall_taux                 5.5936E-03            NORMALIZED  1.3070E-01
 RMS lndImp_Fall_tauy                 5.5936E-03            NORMALIZED  1.3070E-01
 RMS lndImp_Sl_anidf                  2.0554E-03            NORMALIZED  1.0261E-02
 RMS lndImp_Sl_anidr                  2.0554E-03            NORMALIZED  1.0261E-02
 RMS lndImp_Sl_avsdf                  2.0554E-03            NORMALIZED  1.0261E-02
 RMS lndImp_Sl_avsdr                  2.0554E-03            NORMALIZED  1.0261E-02
 RMS lndImp_Sl_fv                     6.0521E-03            NORMALIZED  3.1427E-02
 RMS lndImp_Sl_qref                   3.7818E-05            NORMALIZED  9.6302E-03
 RMS lndImp_Sl_ram1                   1.0268E+01            NORMALIZED  5.0912E-02
 RMS lndImp_Sl_snowh                  2.4103E-03            NORMALIZED  8.7984E-02
 RMS lndImp_Sl_t                      1.8861E+00            NORMALIZED  7.2076E-03
 RMS lndImp_Sl_tref                   2.1301E-01            NORMALIZED  8.0407E-04
 RMS lndImp_Sl_u10                    2.7456E-02            NORMALIZED  1.3279E-02

[slevis-lmwg]

@ekluzek
Seems reasonable. This does not affect the rest of aux_clm, so testing is fine, right? Did John Dennis review your changes?

[ekluzek]

@ekluzek Seems reasonable. This does not affect the rest of aux_clm, so testing is fine, right? Did John Dennis review your changes?

Good questions @slevis-lmwg. Yes, there isn't a way for it to affect aux_clm. John gave me the list to run and PE layout sizes, but I don't think he would need to see these details. But, that does remind me that I need to push a change to some performance timers from a different branch. So I'll do that before merging this in.

[ekluzek]

These changes do change answers, I didn't catch this when I pushed this.

SMS_D_Ln1.f10_f10_mg37.I2000Clm50BgcCropQianRs.derecho_intel.clm-run_self_tests.GC.ctsm5361erikb4bdelist

For this type of test it doesn't matter though.