[rust] Support pre-downloaded rust shared library

[frankfliu]

Description

Brief description of what this PR is about

• If this change is a backward incompatible change, why must this change be made?
• Interesting edge cases to note here

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 28.57143% with 25 lines in your changes missing coverage. Please review.

Project coverage is 58.31%. Comparing base (c4baffb) to head (63a32a4). Report is 69 commits behind head on master.

Files with missing lines	Patch %	Lines
...va/ai/djl/huggingface/tokenizers/jni/LibUtils.java	28.57%	21 Missing and 4 partials :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3421 +/- ## ============================================ + Coverage 58.25% 58.31% +0.06% - Complexity 5737 5770 +33 ============================================ Files 668 668 Lines 32509 32621 +112 Branches 3439 3468 +29 ============================================ + Hits 18937 19022 +85 - Misses 12125 12142 +17 - Partials 1447 1457 +10 ```

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