Fix %CT4S2 specifier

[fvitt]

modified:   .gitmodules
modified:   cime_config/config_compsets.xml
modified:   components/cam (new commits)

Description of changes

Use %CT4S2 chemistry specifier

Specific notes

Contributors other than yourself, if any:

Fixes: [Github issue #s] And brief description of each issue.

User interface changes?: [ No/Yes ]
[ If yes, describe what changed, and steps taken to ensure backward compatibility ]

Testing performed (automated tests and/or manual tests):
Coupled to active ocn (MOM):

    PASS SMS_Ld2.ne30pg3_t232.B1850C_MTt4s.derecho_intel.allactive-defaultio MODEL_BUILD time=317
    PASS SMS_Ld2.ne30pg3_t232.B1850E_MTt4s.derecho_intel.allactive-defaultio MODEL_BUILD time=320
    PASS SMS_Ld2.ne30pg3_t232.BHISTC_MTt4s.derecho_intel.allactive-defaultio MODEL_BUILD time=317

Prescribed ocn:

    PASS SMS_D_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_LTt1s.derecho_intel.cam-outfrq9s MODEL_BUILD time=113
    PASS SMS_D_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_MTt1s.derecho_intel.cam-outfrq9s MODEL_BUILD time=129
    PASS SMS_D_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_MTt4s.derecho_intel.cam-outfrq9s MODEL_BUILD time=127

Test runs are current in queue