Add focal nodeset

This commit adds the focal nodeset for
multinode so that those can be used for
projects side jobs or testing.

We need to define these as first step to avoid
any conflict on nodeset name if project started
defining these.
Example: three node focal nodeset is already
defined in x/tobiko, fixing the same in depends on.
-I30a6bb63269f031a74f9bff6c765d59d91088797

Depends-On: https://review.opendev.org/#/c/738128/

Change-Id: I5ce49f7a7d52d00555c14b08864bc8975956b20c
Story: #2007865
Task: #40212

Author: Ghanshyam Mann

.zuul.yaml

@@ -108,6 +108,36 @@
         nodes:
           - compute1
 
+- nodeset:
+    name: openstack-two-node-focal
+    nodes:
+      - name: controller
+        label: ubuntu-focal
+      - name: compute1
+        label: ubuntu-focal
+    groups:
+      # Node where tests are executed and test results collected
+      - name: tempest
+        nodes:
+          - controller
+      # Nodes running the compute service
+      - name: compute
+        nodes:
+          - controller
+          - compute1
+      # Nodes that are not the controller
+      - name: subnode
+        nodes:
+          - compute1
+      # Switch node for multinode networking setup
+      - name: switch
+        nodes:
+          - controller
+      # Peer nodes for multinode networking setup
+      - name: peers
+        nodes:
+          - compute1
+
 - nodeset:
     name: openstack-two-node-bionic
     nodes:
@@ -168,6 +198,41 @@
         nodes:
           - compute1
 
+- nodeset:
+    name: openstack-three-node-focal
+    nodes:
+      - name: controller
+        label: ubuntu-focal
+      - name: compute1
+        label: ubuntu-focal
+      - name: compute2
+        label: ubuntu-focal
+    groups:
+      # Node where tests are executed and test results collected
+      - name: tempest
+        nodes:
+          - controller
+      # Nodes running the compute service
+      - name: compute
+        nodes:
+          - controller
+          - compute1
+          - compute2
+      # Nodes that are not the controller
+      - name: subnode
+        nodes:
+          - compute1
+          - compute2
+      # Switch node for multinode networking setup
+      - name: switch
+        nodes:
+          - controller
+      # Peer nodes for multinode networking setup
+      - name: peers
+        nodes:
+          - compute1
+          - compute2
+
 - nodeset:
     name: openstack-three-node-bionic
     nodes: