Fixed import for collect stats

[sarthakpati]

Fixes #N.A.

Proposed Changes

• fixed imports for gandlf_collectStats

Checklist

• I have read the CONTRIBUTING guide.
• My PR is based from the current GaNDLF master .
• Non-breaking change (does not break existing functionality): provide as many details as possible for any breaking change.
• Function/class source code documentation added/updated.
• Code has been blacked for style consistency.
• If applicable, version information has been updated in GANDLF/version.py.
• If adding a git submodule, add to list of exceptions for black styling in pyproject.toml file.
• Usage documentation has been updated, if appropriate.
• Tests added or modified to cover the changes; if coverage is reduced, please give explanation.
• If customized dependency installation is required (i.e., a separate pip install step is needed for PR to be functional), please ensure it is reflected in all the files that control the CI, namely: python-test.yml, and all docker files [1,2,3].

[github-actions]

MLCommons CLA bot All contributors have signed the MLCommons CLA ✍️ ✅

[codecov]

Codecov Report

Merging #694 (059c4a3) into master (8a8e437) will not change coverage.
The diff coverage is n/a.

❗ Current head 059c4a3 differs from pull request most recent head fc36c7d. Consider uploading reports for the commit fc36c7d to get more accurate results

@@           Coverage Diff           @@
##           master     #694   +/-   ##
=======================================
  Coverage   94.61%   94.61%           
=======================================
  Files         116      116           
  Lines        8062     8062           
=======================================
  Hits         7628     7628           
  Misses        434      434           

Flag	Coverage Δ
unittests	94.61% <ø> (ø)

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