[Bug]: EnvWorkerWithPrompt in LlmDedupSamplingExploreStrategy is not defined

[xuanzhaopeng]

Describe the bug
in LlmDedupSamplingExploreStrategy, it uses EnvWorkerWithPrompt to execute, but it's not exist, I think it's renmaed to EnvWorker.

As result, cannot use LlmDedupSamplingExploreStrategy as task explore strategy