Add qe-tests target

Read PATTERN_INSTALL_CHART from the env as well if it exists

The script is used in make secrets-backend-*. Update needed for slimed
common.

Now the preview will work with remote charts, and local charts as well.
Default helm registry will be oci://quay.io/repository/hybridcloudpatterns/.

Fix scripts after common slim

When doing disconnected installations this allows for setting a single
variable pointing to the internal disconnected registry.

Introduce PATTERN_DISCONNECTED_HOME

…quirement

Update Makefile to reflect a warning if no storageclass is present

After slimming common down the playbook needs renaming because
collections have slightly different naming constraints. Previous error:

❯ ./pattern.sh make load-iib
make -f common/Makefile load-iib
make[1]: Entering directory '/home/michele/Engineering/cloud-patterns/multicloud-gitops'
ERROR! the playbook: rhvp.cluster_utils.iib-ci could not be found
make[1]: *** [common/Makefile:117: load-iib] Error 1
make[1]: Leaving directory '/home/michele/Engineering/cloud-patterns/multicloud-gitops'
make: *** [Makefile:12: load-iib] Error 2

Fix iib loading playbook name

…atic-update