fix #16120

[cooldome]

The problem was that constant args never went through createTypeBoundOps, due to this line:

if getConstExpr(tracked.ownerModule, n, tracked.c.idgen, tracked.graph) != nil:
    return

Tha change is minimal, replaced:

if getConstExpr(tracked.ownerModule, n, tracked.c.idgen, tracked.graph) != nil:
  return

with

if getConstExpr(tracked.ownerModule, n, tracked.c.idgen, tracked.graph) == nil:
  ...

and moved ops in or out from this if statement, no changes to ops themselves.

[Araq]

@narimiran Backport to 1.4 please.