We need helm 3.7 because some charts we use make use of a helm 3.7 feature
(subchart values).
See stackspin/stackspin#1048 for more
details.

Closes: #1048

Fixes: !638

TRIGGER_JOBS=enable-monitoring,enable-nextcloud,enable-rocketchat,enable-single-sign-on,enable-wekan,enable-wordpress

TRIGGER_JOBS=enable-monitoring,enable-nextcloud,enable-rocketchat,enable-single-sign-on,enable-wekan,enable-wordpress

Fixes: #951

This reverts commit 1978d270.

See https://open.greenhost.net/openappstack/openappstack/-/issues/879
for details

Fixes

    ERROR: Cannot uninstall 'six'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.

see https://open.greenhost.net/openappstack/openappstack/-/jobs/99447

This reverts commit 78bd7c08.