Parse number literal width suffixes

Supports [u,i][8,16,32,64,128] and [nat,dec]

Part of #2350

compiler/can/src/def.rs

@@ -840,9 +840,9 @@ fn pattern_to_vars_by_symbol(
             }
         }
 
-        NumLiteral(_, _, _)
-        | IntLiteral(_, _, _)
-        | FloatLiteral(_, _, _)
+        NumLiteral(..)
+        | IntLiteral(..)
+        | FloatLiteral(..)
         | StrLiteral(_)
         | Underscore
         | MalformedPattern(_, _)