[MacPorts] #74233: Add support for C23 and C++23

[MacPorts]

#74233: Add support for C23 and C++23
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 Reporter:  mohd-akram   |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:
 Keywords:               |       Port:
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 Projects are starting to use C23 and C++23. Currently the build for gn is
 failing despite setting `compiler.cxx_standard   2023` with a `error:
 invalid value 'c++23' in '-std=c++23'` error.

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Ticket URL: <https://trac.macports.org/ticket/74233>
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