gdal Multi-Arch packages not installable on armel/armhf

[Sebastiaan Couwenberg]

The recent binNMU of spatialite reveals issues with gdal and Multi-Arch:

  fiona build-depends on:
  - gdal-bin:armel
  gdal-bin depends on:
  - libgdal34t64:armel (>= 3.8.0)
  libgdal34t64 depends on missing:
  - gdal-data:armel (>= 3.8.4+dfsg-3)

  grass build-depends on:
  - libgdal-dev:armel (>= 2.0)
  libgdal-dev depends on:
  - libgdal34t64:armel (= 3.8.4+dfsg-3)
  libgdal34t64 depends on missing:
  - gdal-data:armel (>= 3.8.4+dfsg-3)

libgdal, gdal-bin, and gdal-plugins were marked as Multi-Arch in 
3.8.4+dfsg-1:

 
https://salsa.debian.org/debian-gis-team/gdal/-/commit/e0ba4d2d8916f239b200ad154e241d57bf67782c

gdal-data was already marked some time ago:

 
https://salsa.debian.org/debian-gis-team/gdal/-/commit/1c3d4d1babc5624c8d6b65c7ead1b75ab65e2ae4

These changes seem correct, but I suspect the problem to be this 
any->all->any chain:

  libgdal34t64       (Architecture: any, Multi-Arch: same)
  \_ gdal-data       (Architecture: all, Multi-Arch: foreign)
     \_ gdal-plugins (Architecture: any, Multi-Arch: same)

But since the Multi-Arch values seem correct, I don't know how they 
should be changed to be resolve the uninstallability.

How do I fix this uninstallability issue?

Kind Regards,

Bas

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