[Backport 1.30] use autoupdate/release-1.xx-strict branches for strict (#411)

[neoaggelos]

Backport #411 to the release-1.30 branch

[github-actions]

Package	Line Rate
github.com/canonical/k8s/api/v1	35%
github.com/canonical/k8s/cmd/k8s-apiserver-proxy	0%
github.com/canonical/k8s/cmd/k8s	37%
github.com/canonical/k8s/cmd/k8sd	0%
github.com/canonical/k8s/cmd	0%
github.com/canonical/k8s/cmd/util	15%
github.com/canonical/k8s/pkg/client/dqlite	48%
github.com/canonical/k8s/pkg/client/helm	5%
github.com/canonical/k8s/pkg/client/helm/mock	100%
github.com/canonical/k8s/pkg/client/kubernetes	69%
github.com/canonical/k8s/pkg/k8s/client	0%
github.com/canonical/k8s/pkg/k8s/client/mock	8%
github.com/canonical/k8s/pkg/k8sd/api	14%
github.com/canonical/k8s/pkg/k8sd/api/impl	0%
github.com/canonical/k8s/pkg/k8sd/app	11%
github.com/canonical/k8s/pkg/k8sd/controllers	45%
github.com/canonical/k8s/pkg/k8sd/database	48%
github.com/canonical/k8s/pkg/k8sd/database/util	0%
github.com/canonical/k8s/pkg/k8sd/features	4%
github.com/canonical/k8s/pkg/k8sd/pki	52%
github.com/canonical/k8s/pkg/k8sd/setup	77%
github.com/canonical/k8s/pkg/k8sd/types	78%
github.com/canonical/k8s/pkg/proxy	6%
github.com/canonical/k8s/pkg/snap/mock	85%
github.com/canonical/k8s/pkg/snap	17%
github.com/canonical/k8s/pkg/snap/util	90%
github.com/canonical/k8s/pkg/utils	60%
github.com/canonical/k8s/pkg/utils/control	100%
github.com/canonical/k8s/pkg/utils/errors	100%
github.com/canonical/k8s/pkg/utils/experimental/snapdconfig	12%
github.com/canonical/k8s/pkg/utils/node	0%
github.com/canonical/k8s/pkg/utils/shims	0%
Summary	37% (2544 / 6843)