chore: Add clirr ignore configuration

Add clirr configuration to ignore 7012: Method Added to Interface reports
for new API methods createLink, updateLink, deleteLink, getLink, listLink
and createBucketAsync and updateBucketAsync.

Author: minherz

grpc-google-cloud-logging-v2/clirr-ignored-differences.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<differences>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com.google.logging.v2.ConfigServiceV2Grpc$AsyncService</className>
+    <method>createBucketAsync(com.google.logging.v2.CreateBucketRequest, io.grpc.stub.StreamObserver)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com.google.logging.v2.ConfigServiceV2Grpc$AsyncService</className>
+    <method>createLink(com.google.logging.v2.CreateLinkRequest, io.grpc.stub.StreamObserver)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com.google.logging.v2.ConfigServiceV2Grpc$AsyncService</className>
+    <method>deleteLink(com.google.logging.v2.DeleteLinkRequest, io.grpc.stub.StreamObserver)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com.google.logging.v2.ConfigServiceV2Grpc$AsyncService</className>
+    <method>getLink(com.google.logging.v2.GetLinkRequest, io.grpc.stub.StreamObserver)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com.google.logging.v2.ConfigServiceV2Grpc$AsyncService</className>
+    <method>listLinks(com.google.logging.v2.ListLinksRequest, io.grpc.stub.StreamObserver)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com.google.logging.v2.ConfigServiceV2Grpc$AsyncService</className>
+    <method>updateBucketAsync(com.google.logging.v2.UpdateBucketRequest, io.grpc.stub.StreamObserver)</method>
+  </difference>
+</differences>