fix: validate authz perms with studio instead of LMS

[asadali145]

Description

Calls studio API for Authz permission check instead of LMS to avoid Cross origin request

Testing instructions

• Visit the v2 library and monitor the network tab http://studio.local.openedx.io:8001/api/authz/v1/permissions/validate/me
• It should return 200

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.51%. Comparing base (df79861) to head (8fa6615).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2947   +/-   ##
=======================================
  Coverage   95.51%   95.51%           
=======================================
  Files        1329     1329           
  Lines       30557    30557           
  Branches     6713     6712    -1     
=======================================
  Hits        29186    29186           
  Misses       1315     1315           
  Partials       56       56           

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