[MacPorts] #70774: gtk2 +quartz fails to build on Sequoia

[MacPorts]

#70774: gtk2 +quartz fails to build on Sequoia
----------------------------+--------------------
 Reporter:  MaurizioLoreti  |      Owner:  (none)
     Type:  defect          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.10.1
 Keywords:                  |       Port:  gtk2
----------------------------+--------------------
 As said.  Log file attached; the relevant line is:

 {{{
 info:build gdkimage-quartz.c:150:39: error: 'CGWindowListCreateImage' is
 unavailable: obsoleted in macOS 15.0 - Please use ScreenCaptureKit
 instead.
 {{{

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Ticket URL: <https://trac.macports.org/ticket/70774>
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