Changes

Ri zm calc5 (#1175)

* Ri_zm calc (Part 5) - Implementing calc_Ri_zm
CLUBB tocket #1145

Cleaning up subroutine compute_Cx_fnc_Richardson
1) In advance_helper_module.F90:
- Removed superfluous inputs
- Added Brunt Väisälä frequency variables, shear_sqd, and Lscale_zm as inputs
- Removed call to calc_brunt_vaisala_freq_sqd
- Removed zt2zm(Lscale)
- Removed calculation and stat_update_var of shear_sqd

2) In advance_clubb_core:
- Added stat_update_var for shear_sqd
- Adjusted call to compute_Cx_fnc_Richardson

3) Renamed netcdf variable `shear_sqd` to `ddzt_umvm_sqd` to keep variable names consistent.

Removing duplicate definition of edsclr when CLUBB_CAM is defined.

Ri zm calc6 (#1177)

* Ri_zm calc (Part 6) - Implementing calc_Ri_zm
CLUBB tocket #1145

Eliminating call to calc_stability_correction in advance_xm_wpxp
1) In advance_xm_wpxp_module.F90:
- Eliminated call to calc_stability_correction in calc_xm_wpxp_lhs_terms
- stability_correction is now passed through advance_xm_wpxp to calc_xm_wpxp_lhs_terms
- Cleaned up input lists

2) In advance_clubb_core:
- Adjusted call to advance_xm_wpxp

3) Adjusted spurious_source_test

QuadTune: Add check of global-mean SWCF.

For #910.

remove new unused parameters