[FIX][starter]Fix the missing dependency on the transform JAR in the Spark engine.

[Neilxzn]

Purpose of this pull request

because of transform jar missing in spark executor env, job will fail. This patch will fix this bug
#9238

Does this PR introduce any user-facing change?

no

How was this patch tested?

test spark example pass

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.

[Copilot]

Pull Request Overview

This PR fixes the missing dependency on the transform JAR in the Spark executor environment by adding the necessary import and plugin discovery call to include transform plugins.

• Added import for SeaTunnelTransformPluginDiscovery.
• Instantiated SeaTunnelTransformPluginDiscovery and incorporated its plugin JAR paths into the dependency list.

[hailin0]

Please add testcase

[Hisoka-X]

Please follow the guide to open ci on your fork repository. Thanks https://github.com/apache/seatunnel/pull/9259/checks?check_run_id=41407284853

[Hisoka-X]

Thanks @Neilxzn for update! Please rebese on dev, we can skip dead link check after rebese. Then the other ci can be trigger normally.

[Neilxzn]

Thanks @Neilxzn for update! Please rebese on dev, we can skip dead link check after rebese. Then the other ci can be trigger normally.

Done. Rebase it.