[winstackers] Transition Pike to End of Life

This transition the Pike branch to End of Life. The last patch of the
branch will be tagged with pike-eol tag. The stable/pike branch cannot
be used anymore and will be deleted if this patch merges.

This is needed as stable/pike is not actively maintained in the recent
period and thus gates are mostly broken due to job failures. Besides,
by removing these branches, infra resources will be freed up, too.

Please try to identify any zuul job, that is defined outside of the
repositories in this patch (for example in openstack-zuul-jobs, etc.)
and won't be used anymore if stable/pike is deleted, and propose a job
removal patch for them.

Please +1 if the team is ready for us to proceed with this transition,
or -1 if there are still some activity on the branch and the team wants
to continue to maintain it.

Change-Id: I58b9f2f8e073674ac61e8604e5b5473cacfbaf3d

deliverables/pike/networking-hyperv.yaml

@@ -20,6 +20,10 @@ releases:
       - hash: e38a2356b43e06aee7cb9f19e2ff51273abee87d
         repo: openstack/networking-hyperv
     version: pike-em
+  - version: pike-eol
+    projects:
+      - repo: openstack/networking-hyperv
+        hash: 3a1e01cca65808f0825b017a731ba2b309a9f9cf
 release-notes: https://docs.openstack.org/releasenotes/networking-hyperv/pike.html
 repository-settings:
   openstack/networking-hyperv: {}

deliverables/pike/os-win.yaml

@@ -29,6 +29,10 @@ releases:
       - hash: 22f35e9ce7b734d4f8f930147c9e257f3506f616
         repo: openstack/os-win
     version: pike-em
+  - version: pike-eol
+    projects:
+      - repo: openstack/os-win
+        hash: 37fd8cf3dae38d087e9517160663e405b82803c8
 branches:
   - name: stable/pike
     location: 2.1.0