[native] Expose getting base directory

[yuandagits]

Description

Expose getting base directory

Motivation and Context

We'd like the ability to expose the base directory for cases when we want to apply operations like TTL or other metadata ops on it.

Impact

Exposes a new API in TaskManager

Test Plan

Added simple unit test

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• Adequate tests were added if applicable.
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Release Notes

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== RELEASE NOTES ==

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Hive Connector Changes
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