less verbose sanity checking

If the 'sanity_check' option triggers a warning, don't show the
"Program in disorder!  (Save and restore might fix this.)" and
"Report these messages to <devteam>." messages and also don't run
the crash report submission.

Doesn't affect the fuzzer because it escalates impossible() to
panic() before reaching those extra messages.

src/wizcmds.c

@@ -1435,6 +1435,7 @@ sanity_check(void)
         iflags.sanity_no_check = FALSE;
         return;
     }
+    gp.program_state.in_sanity_check++;
     you_sanity_check();
     obj_sanity_check();
     timer_sanity_check();
@@ -1443,6 +1444,7 @@ sanity_check(void)
     bc_sanity_check();
     trap_sanity_check();
     engraving_sanity_check();
+    gp.program_state.in_sanity_check--;
 }
 
 /* qsort() comparison routine for use in list_migrating_mons() */