plug-ins: port file-psp-save to GimpProcedureConfig

...just to realize that the save function is not implemented. At least
we now properly manage a fake argument of a nop procedure, yay.
5 jobs for master in 10 minutes and 48 seconds (queued for 1 second)
Status Job ID Name Coverage
  Dependencies
passed #455860
deps-git

00:02:50

failed #455861
deps-x86_64-w64-mingw32

00:10:48

 
  Gimp
skipped #455862
gimp-autotools
skipped #455863
gimp-meson
skipped #455864
gimp-x86_64-w64-mingw32-meson
 
Name Stage Failure
failed
deps-x86_64-w64-mingw32 Dependencies
Tell your friend boy Greg T.
that you were standing at the crossroads.
I believe you were sinking down.


Uploading artifacts...
.local/: found 6138 matching files
_deps/: found 3293 matching files

Uploading artifacts to coordinator... ok
id=455861 responseStatus=201 Created token=PwSh7HLV
ERROR: Job failed: exit code 1