Qualify isInvocable


Ensure we don't hit the ADL injection bug.
The isInvocable isn't meant to be a customization point.

Pick-to: 6.11
Change-Id: I63a1fd84ab7c942e983a647803fafdec79e9e53c
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
commitdc72478fab1f27a45283c8db312425411b802fb1
parent1c1de4669d90f3a2eda26938edf948ebc1cc657f
authorJarek Kobus <jaroslaw.kobus@qt.io>
committerJarek Kobus <jaroslaw.kobus@qt.io>
commit timeMon, 1 Jun 2026 10:06:56 +0000