[FLINK-39312][pipeline][HUDI] Fix Hudi connector packaging to include…

[cshuo]

… flink-metrics-dropwizard dependency

Describe the issue this Pull Request addresses

The Hudi pipeline connector declared flink-metrics-dropwizard with test scope in its module pom.xml, which restricted the dependency to test classpaths only, and leads to the failure of job, like:

Caused by: java.lang.NoClassDefFoundError: org/apache/flink/dropwizard/metrics/DropwizardMeterWrapper
at org.apache.hudi.metrics.FlinkStreamWriteMetrics.<init>(FlinkStreamWriteMetrics.java:91) 
at org.apache.hudi.sink.StreamWriteFunction.registerMetrics(StreamWriteFunction.java:457) 
at org.apache.hudi.sink.StreamWriteFunction.open(StreamWriteFunction.java:164) 

This PR removes that scope restriction so the dependency is resolved as a regular module dependency, aligning packaging/classpath behavior for non-test builds and runtime usage of the connector.

Summary and Changelog

• Removed <scope>test</scope> from dependency org.apache.flink:flink-metrics-dropwizard:${flink.version}.
• No logic changes; this is a dependency-scope adjustment only.

[cshuo]

I found a blocking bug in hudi pipeline connector, can you help review and land. cc @lvyanquan