Update golden schema comparison in schema test (#2805)

Postgresql-17.6 introduces two new lines in pg_dump output as a
security feature: `\restricted {HASH}` and `\unrestricted {HASH}`.

We filter out lines starting with these two prefixes when comparing
schemas.

The db upgrade also adds two empty lines to the pg_dump output. We
know ignore all empty lines when comparing schemas.

db/src/test/java/google/registry/sql/flyway/SchemaTest.java

@@ -115,7 +115,7 @@ class SchemaTest {
             Joiner.on(File.separatorChar).join(MOUNTED_RESOURCE_PATH, DUMP_OUTPUT_FILE));
 
     assertThat(dumpedSchema)
-        .ignoringLinesStartingWith("--")
+        .ignoringLinesStartingWith("--", "\\restrict", "\\unrestrict")
         .hasSameContentAs(Resources.getResource("sql/schema/nomulus.golden.sql"));
   }