[MacPorts] #62774: opencv: migrate remaining ports; mark obsolete and replaced_by opencv3

[MacPorts]

#62774: opencv: migrate remaining ports; mark obsolete and replaced_by opencv3
---------------------+----------------------
 Reporter:  mascguy  |      Owner:  mascguy
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  opencv
---------------------+----------------------
 While the vast majority of ports have been migrated off of legacy port
 `opencv`, there are a few remaining.

 In terms of working ports, there is only one:
 * auto-multiple-choice: will be migrated to opencv4 when v1.5 officially
 released

 The other dependent ports are failing to build across all macOS releases
 ||= Port =||= Tracking Ticket =||= Notes =||
 ||caffe||https://trac.macports.org/ticket/62766||Builds failing since 2019
 or earlier. Obsolete?||
 ||digikam||https://trac.macports.org/ticket/62755||Builds failing since at
 least 2018. Also very out-of-date.||
 ||objectmarker||https://trac.macports.org/ticket/58094||Builds failing
 since 2019 or earlier. Obsolete?||
 ||orfeotoolbox||https://trac.macports.org/ticket/62754||Builds failing
 since 2020 or earlier.||

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Ticket URL: <https://trac.macports.org/ticket/62774>
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