[Bugfix][example] Fixing spark test cases (#8589)

Author: liugddx

Diff for: seatunnel-examples/seatunnel-spark-connector-v2-example/pom.xml

@@ -85,8 +85,21 @@
                     <groupId>com.thoughtworks.paranamer</groupId>
                     <artifactId>paranamer</artifactId>
                 </exclusion>
+                <exclusion>
+                    <groupId>io.netty</groupId>
+                    <artifactId>netty</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>io.netty</groupId>
+                    <artifactId>netty-all</artifactId>
+                </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-all</artifactId>
+            <version>4.1.104.Final</version>
+        </dependency>
         <dependency>
             <groupId>com.thoughtworks.paranamer</groupId>
             <artifactId>paranamer</artifactId>