Migrate nova v2.0 legacy job to zuulv3

This commit migrate the legacy-tempest-dsvm-nova-v20-api
job to zullv3 native with new job - tempest-nova-v2-api

Conflicts:
      .zuul.yaml

The conflict is due to Ife046b91c96dd300e8c46125b75623d8e12b8da3

Change-Id: I6915b7deca20eabb88c231b287586c64cdcf3646
(cherry picked from commit f7a4ba969a)

.zuul.yaml

@@ -139,6 +139,21 @@
     run: playbooks/legacy/nova-next/run.yaml
     post-run: playbooks/legacy/nova-next/post.yaml
 
+- job:
+    name: tempest-nova-v2-api
+    parent: devstack-tempest
+    branches:
+      - master
+    description: |
+      This job runs the Tempest compute tests against v2.0 endpoint.
+      Former names for this job was:
+        * legacy-tempest-dsvm-nova-v20-api
+    vars:
+      tox_envlist: all
+      tempest_test_regex: api.*compute
+      devstack_localrc:
+        TEMPEST_COMPUTE_TYPE: compute_legacy
+
 - project:
     # Please try to keep the list of job names sorted alphabetically.
     templates:
@@ -361,7 +376,7 @@
     experimental:
       jobs:
         - nova-lvm
-        - legacy-tempest-dsvm-nova-v20-api:
+        - tempest-nova-v2-api:
             irrelevant-files:
               - ^(placement-)?api-.*$
               - ^(test-|)requirements.txt$