Add sanity check into Pinot Components start() method to ensure data dir is accessible
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enhancement
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Description
During the component start, create and delete a tmp file into the data dir then delete it.
This is to ensure the permission is set correctly and fail earlier with a more explicit error.
Ref: https://apache-pinot.slack.com/archives/C011C9JHN7R/p1747663133588709
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