[bitnami/grafana-alloy] Adapt tests for Openshift (#34290)

Signed-off-by: David Gomez <david.gomez@broadcom.com>

.vib/grafana-alloy/goss/goss.yaml

@@ -27,11 +27,6 @@ file:
     exists: true
     filetype: directory
   {{ end }}
-  {{ if .Vars.alloy.mounts.dockercontainers }}
-  /var/lib/docker/containers:
-    exists: true
-    filetype: directory
-  {{ end }}
 command:
   {{- $uid := .Vars.alloy.containerSecurityContext.runAsUser }}
   {{- $gid := .Vars.podSecurityContext.fsGroup }}