fixes #10838 (#10841)

* fixes #10838
* reject func in types instead
* trigger tests

tests/proc/tfunc_type.nim

@@ -0,0 +1,14 @@
+
+discard """
+  errmsg: "func keyword is not allowed in type descriptions, use proc with {.noSideEffect.} pragma instead"
+"""
+
+type
+  MyObject = object
+    fn: func(a: int): int
+
+proc myproc(a: int): int =
+  echo "bla"
+  result = a
+
+var x = MyObject(fn: myproc)