[PAN-801]: Workspace datasets endpoint added

[shahrukh802]

• Closes #xxxx (Replace xxxx with the GitHub issue number).
• Tests added and passed if fixing a bug or adding a new feature.
• All code checks passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.56%. Comparing base (f88635a) to head (59d05e9).
Report is 3 commits behind head on release/v2.2.

Additional details and impacted files

@@              Coverage Diff              @@
##           release/v2.2    #1207   +/-   ##
=============================================
  Coverage         78.56%   78.56%           
=============================================
  Files               117      117           
  Lines              4624     4624           
=============================================
  Hits               3633     3633           
  Misses              991      991           

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