Allow checking reserved domains with a valid token (#451)

* Add test for checking reserved domain with token

* Allow domain checks with a valid token if the domain isn't fully blocked

* Check specifically for specific-use or anchor reservations

* Add test for LRP in-time token

core/src/test/resources/google/registry/flows/domain/domain_check_allocationtoken.xml

@@ -6,6 +6,7 @@
         <domain:name>example1.tld</domain:name>
         <domain:name>example2.tld</domain:name>
         <domain:name>reserved.tld</domain:name>
+        <domain:name>specificuse.tld</domain:name>
       </domain:check>
     </check>
     <extension>

core/src/test/resources/google/registry/flows/domain/domain_check_anchor_allocationtoken.xml

@@ -0,0 +1,18 @@
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <command>
+    <check>
+      <domain:check
+          xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">
+        <domain:name>anchor.tld</domain:name>
+      </domain:check>
+    </check>
+    <extension>
+      <allocationToken:allocationToken
+          xmlns:allocationToken=
+              "urn:ietf:params:xml:ns:allocationToken-1.0">
+        abc123
+      </allocationToken:allocationToken>
+    </extension>
+    <clTRID>ABC-12345</clTRID>
+  </command>
+</epp>