fix gated builds due to getargspec deprecation

[imatiach-msft]

Gated builds seem to be failing due to error when calling inspect.getargspec in tests:

2023-07-18T22:15:32.9356507Z         if kwonlyargs or ann:
2023-07-18T22:15:32.9356904Z >           raise ValueError("Function has keyword-only parameters or annotations"
2023-07-18T22:15:32.9357273Z                              ", use inspect.signature() API which can support them")
2023-07-18T22:15:32.9358074Z E           ValueError: Function has keyword-only parameters or annotations, use inspect.signature() API which can support them

See build:
https://pipelines.actions.githubusercontent.com/serviceHosts/c1806717-186f-43d1-b5bb-864035754060/_apis/pipelines/1/runs/1655/signedlogcontent/3?urlExpires=2023-07-19T13%3A49%3A56.8756087Z&urlSigningMethod=HMACV1&urlSignature=n7yT0tLu9c5kxVKqapcs71ABVMRu34O077hYnZORsVs%3D

According to similar issue:
treethought/flask-assistant#89

The reason for this is that [inspect.getargspec](https://docs.python.org/3/library/inspect.html#classes-and-functions) can't handle type annotations and is deprecated in favor of inspect.getfullargspec. According to the documentation the latter should be a drop-in replacement, but this should probably be tested.

Hence, using inspect.getfullargspec as a drop-in replacement for the previous method to resolve the build errors.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (3d67671) 87.70% compared to head (cd840bd) 87.70%.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #570   +/-   ##
=======================================
  Coverage   87.70%   87.70%           
=======================================
  Files          62       62           
  Lines        4075     4075           
=======================================
  Hits         3574     3574           
  Misses        501      501           

Flag	Coverage Δ
unittests	87.70% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...interpret_community/mimic/models/lightgbm_model.py	86.51% <100.00%> (+0.56%)	⬆️

... and 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.