Retire ec2-api project

ec2-api project is in inactive list since 2024.1
- https://governance.openstack.org/tc/reference/emerging-technology-and-inactive-projects.html#current-inactive-projects

and there is no leader in 2024.2 cycle
- https://etherpad.opendev.org/p/2024.2-leaderless

There is no response on last call for maintainers and retirement
notification:
- https://lists.openstack.org/archives/list/openstack-discuss@lists.openstack.org/thread/3B43DDZRNL7WZRBLJURIN723JNYNFNQX/
Seeing project inactivities, open critical bug, and no maintainers
for this project, this commit propose to retire this project.

Change-Id: I6170607b59f9daaecaf5b66cee883f1ec5c7e857

reference/legacy.yaml

@@ -195,6 +195,21 @@ Documentation:
       repos:
         - openstack/rst2bash
 
+ec2-api:
+  irc-channel: openstack-ec2api
+  service: EC2 API compatibility layer for OpenStack
+  mission: >
+    To provide an EC2-compatible API for accessing OpenStack features.
+  url: https://wiki.openstack.org/wiki/EC2API
+  retired-on: 2024-05-10
+  deliverables:
+    ec2-api:
+      repos:
+        - openstack/ec2-api
+    ec2api-tempest-plugin:
+      repos:
+        - openstack/ec2api-tempest-plugin
+
 fuel:
   irc-channel: fuel
   service: Deployment service

reference/projects.yaml

@@ -231,25 +231,6 @@ designate:
     python-designateclient:
       repos:
         - openstack/python-designateclient
-ec2-api:
-  ptl:
-    name: APPOINTMENT NEEDED
-    irc: No nick supplied
-    email: example@example.org
-  appointed:
-    - '2024.1'
-  irc-channel: openstack-ec2api
-  service: EC2 API compatibility layer for OpenStack
-  mission: >
-    To provide an EC2-compatible API for accessing OpenStack features.
-  url: https://wiki.openstack.org/wiki/EC2API
-  deliverables:
-    ec2-api:
-      repos:
-        - openstack/ec2-api
-    ec2api-tempest-plugin:
-      repos:
-        - openstack/ec2api-tempest-plugin
 freezer:
   leadership_type: distributed
   liaisons: