[MacPorts] #70585: py310-pyqt5-webengine upgrade broken on port version 2.10.1 on Ventura 13.6.7

[MacPorts]

#70585: py310-pyqt5-webengine upgrade broken on port version 2.10.1 on Ventura
13.6.7
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  Reporter:  Alex11N                |      Owner:  reneeotten
      Type:  defect                 |     Status:  assigned
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:  2.10.1
Resolution:                         |   Keywords:
      Port:  py310-pyqt5-webengine  |
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Comment (by jmroot):

 Could be that
 `DEVELOPER_DIR='/Applications/Xcode.app/Contents/Developer'`, which is set
 as a result of `use_xcode   yes` in the Portfile, makes xcrun unable to
 find SDKs provided by the CLTs. As I'm sure has been noted before, it
 would be a lot easier if Qt just let us tell it which SDK path to use.

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Ticket URL: <https://trac.macports.org/ticket/70585#comment:9>
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