cam6_4_101: Write cam_in%cflx for all constituents, not just Q

[jimmielin]

Purpose of changes (include the issue number and title text for each relevant GitHub issue):

• Write cam_in%cflx for all constituents instead of just Q as it was declared horiz_only. Now write out as cam_in_cflx_(constituent name) - cam_in%cflx snapshot missing pcnst dimension #1335

Describe any changes made to build system: N/A

Describe any changes made to the namelist: N/A

List any changes to the defaults for the boundary datasets: N/A

Describe any substantial timing or memory changes: N/A

Code reviewed by:

List all files eliminated: N/A

List all files added and what they do: N/A

List all existing files that have been modified, and describe the changes:

M       src/control/cam_snapshot_common.F90
  - fix #1335

If there were any failures reported from running test_driver.sh on any test
platform, and checkin with these failures has been OK'd by the gatekeeper,
then copy the lines from the td.*.status files for the failed tests to the
appropriate machine below. All failed tests must be justified.

derecho/intel/aux_cam:

derecho/nvhpc/aux_cam:

izumi/nag/aux_cam:

izumi/gnu/aux_cam:

CAM tag used for the baseline comparison tests if different than previous
tag:

Summarize any changes to answers: snapshot only