perf(worker): rebuild only when affected #20559
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Description
Instead of building the worker every time any file is changed (before this PR
shouldTransformCachedModulereturns true), this PR makes the worker plugin to track the watched files so that the worker is re-built only when the content is changed.This PR was initiated by the fact that the usage of
shouldTransformCachedModulemakes it difficult to make the plugins performant (rolldown/rolldown#4389).refs #11919, #14712