community/gnome-software: split flatpak plugin into -plugin-flatpak

Not everyone wants/needs the flatpak plugin, so split
it off and auto-install it if flatpak is installed.
7 jobs for !9485 with gnome-software in 2 minutes and 8 seconds
detached
Status Job ID Name Coverage
  Lint
passed #149529
x86_64 docker-alpine
lint

00:00:27

 
  Build
failed #149534
aarch64 ci-build docker-alpine
build-aarch64

00:00:21

failed #149535
armv7 ci-build docker-alpine
build-armv7

00:00:52

failed #149533
ppc64le ci-build docker-alpine
build-ppc64le

00:00:17

failed #149532
s390x ci-build docker-alpine
build-s390x

00:00:19

failed #149531
x86 ci-build docker-alpine
build-x86

00:00:07

failed #149530
x86_64 ci-build docker-alpine
build-x86_64

00:00:09

 
Name Stage Failure
failed
build-armv7 Build
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build-s390x Build
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build-aarch64 Build
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build-ppc64le Build
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build-x86_64 Build
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build-x86 Build
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