TST: Refactor struct module to use pytest

[anish-mudaraddi]

refactor struct module tests to use pytest fixtures and conventions

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (e11ff2a) 97.48% compared to head (d56cbea) 97.62%.
Report is 16 commits behind head on main.

❗ Current head d56cbea differs from pull request most recent head 5d83632. Consider uploading reports for the commit 5d83632 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #144      +/-   ##
==========================================
+ Coverage   97.48%   97.62%   +0.14%     
==========================================
  Files         174      174              
  Lines        7011     7046      +35     
  Branches      436      437       +1     
==========================================
+ Hits         6835     6879      +44     
+ Misses        145      136       -9     
  Partials       31       31              

Files	Coverage Δ
...uery/handlers/test_client_side_handler_datetime.py	100.00% <100.00%> (ø)
tests/structs/test_email_params.py	100.00% <100.00%> (ø)
tests/structs/test_query_output_details.py	100.00% <100.00%> (ø)
tests/structs/test_smtp_account.py	100.00% <100.00%> (ø)
...query/handlers/test_client_side_handler_generic.py	96.00% <95.45%> (ø)
...query/handlers/test_client_side_handler_integer.py	95.45% <95.00%> (ø)

... and 11 files with indirect coverage changes

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