Cleanup most switches
[cleanup] accept FIX_619_ADD_UNDEF_VAL_FOR_CONCEALMENT_MODE, FIX_622_SILENCE_USAN_WARNING, FIX_615_UBSAN_SPAR_TO_DIRAC
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[cleanup] accept FIX_619_ADD_UNDEF_VAL_FOR_CONCEALMENT_MODE, FIX_622_SILENCE_USAN_WARNING, FIX_615_UBSAN_SPAR_TO_DIRAC