artifact tracking again

Redo the recent artifact creation stuff by replacing several nearly
identical routines with one more general one.  Also adds a tracking
bit for one or two more creation methods.  That changed artiexist[]
from an array of structs holding 8 or less bits to one holding 9, so
bump EDITLEVEL in case the total size changed.

src/zap.c

@@ -5602,7 +5602,7 @@ makewish(void)
 
         if (otmp->oartifact)
             /* update artifact bookkeeping; doesn't produce a livelog event */
-            (void) artifact_wish(otmp, TRUE); /* calls found_artifact() */
+            artifact_origin(otmp, ONAME_WISH | ONAME_KNOW_ARTI);
     }
 
     /* wisharti conduct handled in readobjnam() */