QTextEdit::setTabChangesFocus has no effect

As of Qt 6.4.1, and only on macOS, when a QTextEdit is set to allow typing tab characters using QTextEdit::setTabChangesFocus, trying to type tab will instead change the focus and not type anything. This behavior has only been seen with these conditions. Other platforms, and Qt <= 6.4.0 do not do this.

Repro steps:

1. Build attached code sample
2. Run built product
3. Type some text in textbox, observe text is typed
4. Press tab
   1. Observe focus is moved to button, and no tab is typed (6.4.1 macOS)
   2. Observe focus remains in text edit, and tab is typed (other platforms)