Move definitions of wxTE_XXX flags that can be used with the controls
other than wxTextCtrl to wx/defs.h, as wxFormBuilder generates code
using them without including wx/textctrl.h, so that this code doesn't
compile.
This was already addressed in 2970f22a89 (Include <wx/textctrl.h> from
<wx/combobox.h> for compatibility., 2012-03-25) for wxComboBox, but it
also happened for wxSpinCtrl, so fix it once and for all by always
defining these styles.
This partially reverts the changes done in c57e33394c ([...] moved
wxTextCtrl-specific stuff from defs.h/event.h to textctrl.h, 2001-07-29)
as it turns out, 20 years later, that this wasn't such a great idea.
See #14132.
Closes#19225.
d3eafa4d18