[MacPorts] #56053: Respect cxx_stdlib and delete_la_files in selection of archive_site

[MacPorts]

#56053: Respect cxx_stdlib and delete_la_files in selection of archive_site
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  Reporter:  raimue       |      Owner:
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:  MacPorts 2.5.0
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:               |
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Comment (by raimue):

 And we also need the same for `startupitem_install`. The symlinks for
 /Library/{LaunchAgents,LaunchDaemons} are in the archive (see #44496).

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Ticket URL: <https://trac.macports.org/ticket/56053#comment:1>
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