Baseline archiving fails if regression tests are re-run manually

### What happened?

If, after running `test_driver.sh`, one finds that a test needs to be re-run manually and does so, then when they try to run `archive_baseline.sh` it can fail to actually archive any baselines, although one may not notice that it failed as it still creates all of the relevant directories and doesn't throw any sort of warning or error message.

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

Follow the steps listed here for running the CAM regressions tests:

https://github.com/ESCOMP/CAM/wiki/CAM-SE-Workflows#run-cam-tests

Then try doing the steps for manually re-running individual tests (e.g. `./.case_test --reset`), then try archiving the baselines. If the bug triggered then you should find that the test which you re-ran manually hasn't actually been archived, even if the test itself passed.

### What CAM tag were you using?

cam6_3_137

### What machine were you running CAM on?

CISL machine (e.g. cheyenne)

### What compiler were you using?

Intel

### Path to a case directory, if applicable

_No response_

### Will you be addressing this bug yourself?

Any CAM SE can do this

### Extra info

For now, if you find that you manually re-ran a test and the baseline isn't archiving properly, then you can either try and manually archive the baseline for that test yourself, or re-run the test suite from the beginning, after which the baseline archiving script should work as expected.

Finally, pinging @fischer-ncar in case he has any insights.