[Fix] Fix inferencer gets wrong configs path

[HAOCHENYE]

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Motivation

Fix inferencer get wrong configs path.

Modification

Please briefly describe what modification is made in this PR.

BC-breaking (Optional)

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Use cases (Optional)

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Checklist

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2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. If the modification has potential influence on downstream projects, this PR should be tested with downstream projects, like MMDet or MMCls.
4. The documentation has been modified accordingly, like docstring or example tutorials.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@789330e). Click here to learn what that means.
Patch has no changes to coverable lines.

❗ Current head f50d3b9 differs from pull request most recent head ba916e2. Consider uploading reports for the commit ba916e2 to get more accurate results

Additional details and impacted files

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  Coverage        ?   76.57%           
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  Files           ?      139           
  Lines           ?    11037           
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  Hits            ?     8452           
  Misses          ?     2219           
  Partials        ?      366           

Flag	Coverage Δ
unittests	76.57% <0.00%> (?)

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