Merge changes from apertis/v2021-updates into apertis/v2021

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

By default pipelines do not run in Merge Request context, but that's
exactly what the parent ci-package-builder pipeline is now doing.

Add a rule to run the local pipeline in whatever context the parent
pipeline triggered it.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Demote dependency on ribchester to a suggests since we no longer ship
the Canterbury appfw on the Bullseye based v2022dev2.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Add some rules to the local pipeline so it gets skipped when tags are
pushed, instead of creating jobs that are currently failing.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Apertis has moved to using external references in the CI config path setting
for the packagign repositories, so the gitlab-ci.yml embedded in the
repository is no longer needed.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Running `ade sysroot install --release v2021dev3 --arch amd64` results
in `ade` complaining with:

    usage: ade sysroot install [-h] [--verbose] [--distro DISTRO]
                               [--release RELEASE] [--arch {armhf,arm64}]
                               [--url URL] [--user USER] [--password PASSWORD]
                               [--netrc NETRC] [--file FILE] [--force]
    ade sysroot install: error: argument --arch: invalid choice: 'amd64' (choose from 'armhf', 'arm64')

This means that developers attempting to target amd64 targets aren't
going to be able to follow the ADE documentation and we can't easily
target different releases using ADE when using an amd64 target, so
sync the list of allowable values with the main list of the kind of
sysroots we support.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>