[MacPorts] #68355: R and its dependents: move to gcc13 and clang16/17

[MacPorts]

#68355: R and its dependents: move to gcc13 and clang16/17
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 Reporter:  barracuda156  |      Owner:  i0ntempest
     Type:  enhancement   |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.8.1
 Keywords:                |       Port:  R
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 It is desirable to update compilers being used ''at once,'' since such
 change entails revbumping 4k ports :)
 It is desirable to use to latest GCC, since Macports use that to build
 earlier ones (so remaining on gcc12 implies that one has to build gcc13
 and then gcc12, which on older machines takes forever).

 I will test gcc13 from my side; could someone test a newer clang?

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Ticket URL: <https://trac.macports.org/ticket/68355>
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