[Improve][Connector-V2] Add branch option for paimon sink

Author: xiaochen-zhou

seatunnel-e2e/seatunnel-connector-v2-e2e/connector-paimon-e2e/src/test/java/org/apache/seatunnel/e2e/connector/paimon/PaimonSinkBranchIT.java

@@ -75,6 +75,7 @@ public class PaimonSinkBranchIT extends TestSuiteBase implements TestResource {
                 container.copyFileToContainer(
                         MountableFile.forHostPath(schemaPath),
                         "/tmp/seatunnel_mnt/paimon/default.db/st_test_p/schema/schema-0");
+                container.execInContainer("chmod", "777", "-R", "/tmp/seatunnel_mnt/");
             };
 
     @Override