build: register clirr difference

Author: olavloite

google-cloud-spanner/clirr-ignored-differences.xml

@@ -927,5 +927,23 @@
     <className>com/google/cloud/spanner/connection/ConnectionOptions</className>
     <field>VALID_PROPERTIES</field>
   </difference>
+
+  <!-- Remove supportsExplain() from the parser -->
+  <difference>
+    <differenceType>7002</differenceType>
+    <className>com/google/cloud/spanner/connection/AbstractStatementParser</className>
+    <method>boolean supportsExplain()</method>
+  </difference>
+  <difference>
+    <differenceType>7002</differenceType>
+    <className>com/google/cloud/spanner/connection/PostgreSQLStatementParser</className>
+    <method>boolean supportsExplain()</method>
+  </difference>
+  <difference>
+    <differenceType>7002</differenceType>
+    <className>com/google/cloud/spanner/connection/SpannerStatementParser</className>
+    <method>boolean supportsExplain()</method>
+  </difference>
+
 
 </differences>