[MacPorts] #51391: Update pypi helpers and make python packages to use it

[MacPorts]

#51391: Update pypi helpers and make python packages to use it
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  Reporter:  xeron.oskom@…  |      Owner:  macports-tickets@…
      Type:  enhancement    |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:  haspatch
      Port:                 |
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Comment (by xeron.oskom@…):

 Modifying `livecheck` because previously used XML page is not available
 for new versions of packages (redirects to JSON page).

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Ticket URL: <https://trac.macports.org/ticket/51391#comment:1>
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