Release oslo.log 5.0.0 to fix bugs

See:
- http://lists.openstack.org/pipermail/openstack-discuss/2022-May/028489.html
- https://review.opendev.org/c/openstack/requirements/+/840630
- https://review.opendev.org/c/openstack/oslo.log/+/841383

The major version is related to the support abandon of py3.6 and py3.7.

Change-Id: I2afbd539f4a92b21ff56e95930f30f86aa9e7344

deliverables/_independent/oslo.log.yaml

@@ -26,3 +26,7 @@ releases:
     projects:
       - repo: openstack/oslo.log
         hash: ebdee7f39920ad5b4268ee296952432b0d41a375
+  - version: 5.0.0
+    projects:
+      - repo: openstack/oslo.log
+        hash: 6401da71b3b1b8d0fc213f0a58dbf69031acba87