Merge pull request #19600 from Kaiede/32bitBuiltinWordFix

Add sextOrBitCast to conversions of Builtin.Word

Author: jckarter

stdlib/public/core/IntegerTypes.swift.gyb

@@ -1617,15 +1617,15 @@ ${assignmentOperatorComment(x.operator, True)}
 % if BuiltinName == 'Int32':
     self._value = Builtin.truncOrBitCast_Word_Int32(_v)
 % elif BuiltinName == 'Int64':
-    self._value = Builtin.zextOrBitCast_Word_Int64(_v)
+    self._value = Builtin.${z}extOrBitCast_Word_Int64(_v)
 % end
   }
 
   @_transparent
   public // @testable
   var _builtinWordValue: Builtin.Word {
 % if BuiltinName == 'Int32':
-    return Builtin.zextOrBitCast_Int32_Word(_value)
+    return Builtin.${z}extOrBitCast_Int32_Word(_value)
 % elif BuiltinName == 'Int64':
     return Builtin.truncOrBitCast_Int64_Word(_value)
 % end