Add openstack/etcd3gw

Per [1] and [2].

Cloned from forked repo to skip old branches.

[1] https://github.com/dims/etcd3-gateway/issues/29
[2] http://lists.openstack.org/pipermail/openstack-discuss/2020-August/016470.html

Needed-By: https://review.opendev.org/747188
Change-Id: If9189ccef8a5f58c7228f72c1381c2bc47d5f356

gerrit/acls/openstack/etcd3gw.config

@@ -0,0 +1,31 @@
+[access "refs/heads/*"]
+abandon = group etcd3gw-core
+label-Backport-Candidate = -2..+2 group etcd3gw-core
+label-Backport-Candidate = -1..+1 group Registered Users
+label-Code-Review = -2..+2 group etcd3gw-core
+label-Workflow = -1..+1 group etcd3gw-core
+
+[access "refs/heads/stable/*"]
+abandon = group stable-maint-core
+label-Code-Review = -2..+2 group stable-maint-core
+label-Workflow = -1..+1 group stable-maint-core
+
+[label "Backport-Candidate"]
+copyAllScoresIfNoCodeChange = true
+copyAllScoresOnTrivialRebase = true
+copyMaxScore = true
+copyMinScore = true
+defaultValue = 0
+function = NoBlock
+value = -2 Do Not Backport
+value = -1 Not A Backport Candidate
+value = 0 Backport Review Needed
+value = +1 Proposed Backport
+value = +2 Should Backport
+
+[receive]
+requireChangeId = true
+requireContributorAgreement = true
+
+[submit]
+mergeContent = true

gerrit/projects.yaml

@@ -2932,6 +2932,9 @@
   use-storyboard: true
 - project: openstack/eslint-config-openstack
   description: JavaScript Style Guidelines for OpenStack.
+- project: openstack/etcd3gw
+  description: An etcd3 grpc-gateway v3 API Python client
+  upstream: https://github.com/yoctozepto/etcd3gw
 - project: openstack/faafo
   description: RETIRED, First App Application for OpenStack
   acl-config: /home/gerrit2/acls/openstack/retired.config

gerritbot/channels.yaml

@@ -1061,6 +1061,7 @@ openstack-oslo:
     - openstack/devstack-plugin-kafka
     - openstack/devstack-plugin-pika
     - openstack/devstack-plugin-zmq
+    - openstack/etcd3gw
     - openstack/futurist
     - openstack/openstack-doc-tools
     - openstack/openstackdocstheme

zuul/main.yaml

@@ -458,6 +458,7 @@
           - openstack/election
           - openstack/enterprise-wg
           - openstack/eslint-config-openstack
+          - openstack/etcd3gw
           - openstack/freezer
           - openstack/freezer-api
           - openstack/freezer-dr