CAM-SIMA tests with multiple history tapes configured = NLFAIL

### What happened?

1. CIME checks to ensure there are not duplicate namelist entires in atm_in as part of the namelist comparison to baselines
2. CAM-SIMA history creates one namelist entry (`&hist_file_config_nl`) for each history file.
3. The result is that any test with multiple history files yield NLFAIL

### What are the steps to reproduce the bug?

1. Check out the head of CAM-SIMA
2. Run the tests from $CAM-SIMA/test/system - `env CAM_FC=gnu ./test_driver.sh -f`
3. Observe the NLFAIL and inspect the TestStatus.log file to see the error from CIME.

### What CAM-SIMA hash were you using?

6337cc0

### What machine were you running CAM-SIMA on?

CISL machine (e.g. cheyenne)

### What compiler were you using?

GNU

### Path to a case directory, if applicable

/glade/derecho/scratch/courtneyp/aux_sima_gnu_20251001133130/SMS_Ln9.ne3pg3_ne3pg3_mg37.FCAM4.derecho_gnu.cam-outfrq_se_cslam_analy_ic_cam4.GC.aux_sima_gnu_20251001133130

### Will you be addressing this bug yourself?

Any Software Engineer can do this

### Extra info

The fix for this may require a CIME update/flag.