Ignore Stein-specific release notes

We merged and backported a lot of fixes for the Stein RC. Since they
landed in master first, reno renders them in the "unreleased" page, but
since they are about to be released for Stein it's not appropriate to
leave them there, so this change explicitly ignores them. We can also
now remove old ignored release notes.

Change-Id: Iad8bf7e03dd9672add9f01794c9b3e0ba4257831

releasenotes/source/unreleased.rst

@@ -4,15 +4,16 @@
 
 .. release-notes::
    :ignore-notes:
-     bp-allow-expired-f5d845b9601bc1ef.yaml,
+     bug-1806762-c3bfc71cb9bb94f3.yaml,
-     bp-shadow-mapping-06fc7c71a401d707.yaml,
+     bug-1817313-c11481e6eed29ec2.yaml,
-     bp-support-federated-attr-94084d4073f50280.yaml,
+     bug-1806762-2092fee9f6c87dc3.yaml,
-     integrate-osprofiler-ad0e16a542b12899.yaml,
+     bug-1805369-ed98d3fcfafb5c43.yaml,
-     bug-1561054-dbe88b552a936a05.yaml,
+     scope-and-default-roles-a733c235731bb558.yaml,
-     bug-1642687-5497fb56fe86806d.yaml,
+     bug-1806762-09f414995924db23.yaml,
-     bug-1642687-c7ab1c9be152db20.yaml,
+     bug-1801873-0eb9a5ec3e801190.yaml,
-     bug-1642687-5497fb56fe86806d.yaml,
+     bug-1750669-dfce859550126f03.yaml,
-     bug-1659995-f3e716de743b7291.yaml,
+     bug-1750673-b53f74944d767ae9.yaml,
-     bug-1636950-8fa1a47fce440977.yaml,
+     bug-1748027-decc2e11154b97cf.yaml,
-     bug-1659995-f3e716de743b7291.yaml,
+     bug-1750660-e2a360ddd6790fc4.yaml,
-     bug-1652012-b3aea7c0d5affdb6.yaml
+     bug-1819036-e2d24655c70d0aad.yaml,
+     bug-1805406-252b45d443af20b3.yaml,