Update minimal size

For development/testing purposes we shouldn't use regular control plane VMs sizes
to save HW resources. For that we need to upgrade  "minimal" value of "openstack_cluster_size"
variable from cookiecutter templates and describe the sizes in reclass-system .
The sizes should be set according to "minimal." flavors from Architecturies document

Minimal size was created by https://gerrit.mcp.mirantis.com/#/c/18279/
for CI and not described in public documentd and no client affected.

Depends-On: https://gerrit.mcp.mirantis.com/#/c/34789/

Change-Id: I8d463080be43aad427d5f6941d721efd76ce156a
Prod-related: PROD-26630 (PROD:26630)
diff --git a/salt/control/virt.yml b/salt/control/virt.yml
index 05bf23d..08c1bca 100644
--- a/salt/control/virt.yml
+++ b/salt/control/virt.yml
@@ -21,12 +21,24 @@
       xxxsmall:
         - system:
             size: 8000
+      minimal_xxsmall:
+        - system:
+            size: 10000
       xxsmall:
         - system:
             size: 15000
+      minimal_xsmall:
+        - system:
+            size: 20000
       xsmall:
         - system:
             size: 30000
+      minimal_small:
+        - system:
+            size: 35000
+      minimal_medium:
+        - system:
+            size: 40000
       small:
         - system:
             size: 50000