Fix SILKY_IGNORE_PATHS using path instead of path_info

[djmango]

Proposed solution in #349
@shimizukawa
@Korben11

[codecov]

Codecov Report

Merging #577 (ee0812e) into master (5afcdea) will decrease coverage by 0.53%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #577      +/-   ##
==========================================
- Coverage   84.60%   84.07%   -0.54%     
==========================================
  Files          52       52              
  Lines        2072     2072              
==========================================
- Hits         1753     1742      -11     
- Misses        319      330      +11     

Impacted Files	Coverage Δ
silk/middleware.py	89.42% <100.00%> (ø)
silk/utils/data_deletion.py	52.38% <0.00%> (-47.62%)	⬇️
silk/code_generation/django_test_client.py	65.21% <0.00%> (-4.35%)	⬇️

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