monthly instant output leads to failure.

For some recent ne256 runs on Perlmutter I accidentally used `Averaging Type: Instant` for my monthly output stream and it led to this error message:
```
800:
800: FAIL:
800: mm>=1 && mm<=12
800: /global/u1/w/whannah/SCREAM/SCREAM_SRC0/components/eamxx/src/share/util/scream_time_stamp.cpp:20
800: Error! Month out of bounds. Did you call `days_in_month` with yy and mm swapped?
800:
800: terminate called after throwing an instance of 'std::logic_error'
800: what():
800: FAIL:
800: mm>=1 && mm<=12
800: /global/u1/w/whannah/SCREAM/SCREAM_SRC0/components/eamxx/src/share/util/scream_time_stamp.cpp:20
800: Error! Month out of bounds. Did you call `days_in_month` with yy and mm swapped?
800:
800:
800: Program received signal SIGABRT: Process abort signal.
800:
800: Backtrace for this error:
800: #0 0x14ad68729dbf in ???
800: #1 0x14ad68729d2b in ???
800: #2 0x14ad6872b3e4 in ???
800: #3 0x14ad68a98035 in _ZN9__gnu_cxx27__verbose_terminate_handlerEv
800: at ../../../../libstdc++-v3/libsupc++/vterminate.cc:95
800: #4 0x14ad68a96523 in _ZN10__cxxabiv111__terminateEPFvvE
800: at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:48
800: #5 0x14ad68a96575 in _ZSt9terminatev
800: at ../../../../libstdc++-v3/libsupc++/eh_terminate.cc:58
800: #6 0x14ad68a967b3 in __cxa_rethrow
800: at ../../../../libstdc++-v3/libsupc++/eh_throw.cc:136
800: #7 0x421ed6 in ???
800: #8 0x604825 in ???
800: #9 0x57bac4 in ???
800: #10 0x56bc7c in ???
800: #11 0x521ddc in ???
800: #12 0x14ad6871424c in ???
800: #13 0x55d689 in _start
800: at ../sysdeps/x86_64/start.S:120
800: #14 0xffffffffffffffff in ???
srun: error: nid002800: task 509: Aborted
srun: error: nid002800: tasks 508,510-511: Aborted
```

This is related to #2662 and PR #2664. I can't imagine why anyone would want monthly instantaneous output - but it seems weird for the model to fail in this manner for these settings.