[Backend] Add API to access and delete leaderboard data for admins

[Suryansh5545]

Add API to access leaderboard data details, and perform delete action, can only be performed with staff user

[codecov-commenter]

Codecov Report

Merging #4086 (0f10404) into master (96968d6) will decrease coverage by 3.07%.
Report is 993 commits behind head on master.
The diff coverage is 46.77%.

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@@            Coverage Diff             @@
##           master    #4086      +/-   ##
==========================================
- Coverage   72.93%   69.86%   -3.07%     
==========================================
  Files          83       20      -63     
  Lines        5368     3528    -1840     
==========================================
- Hits         3915     2465    -1450     
+ Misses       1453     1063     -390     

Files Changed	Coverage Δ
frontend/src/js/controllers/analyticsCtrl.js	80.72% <ø> (ø)
frontend/src/js/controllers/authCtrl.js	53.91% <8.33%> (-12.95%)	⬇️
frontend/src/js/controllers/permissionCtrl.js	36.36% <22.22%> (-63.64%)	⬇️
frontend/src/js/controllers/challengeCtrl.js	62.17% <38.48%> (-11.52%)	⬇️
frontend/src/js/controllers/updateProfileCtrl.js	82.55% <44.44%> (-10.30%)	⬇️
frontend/src/js/controllers/profileCtrl.js	66.50% <54.48%> (-26.35%)	⬇️
...ntend/src/js/controllers/challengeHostTeamsCtrl.js	70.50% <66.66%> (-1.18%)	⬇️
frontend/src/js/controllers/teamsCtrl.js	71.17% <75.00%> (ø)
frontend/src/js/controllers/challengeListCtrl.js	93.93% <98.07%> (-0.75%)	⬇️
frontend/src/js/controllers/ChallengeInviteCtrl.js	100.00% <100.00%> (ø)
... and 7 more

... and 63 files with indirect coverage changes

Files Changed	Coverage Δ
frontend/src/js/controllers/analyticsCtrl.js	80.72% <ø> (ø)
frontend/src/js/controllers/authCtrl.js	53.91% <8.33%> (-12.95%)	⬇️
frontend/src/js/controllers/permissionCtrl.js	36.36% <22.22%> (-63.64%)	⬇️
frontend/src/js/controllers/challengeCtrl.js	62.17% <38.48%> (-11.52%)	⬇️
frontend/src/js/controllers/updateProfileCtrl.js	82.55% <44.44%> (-10.30%)	⬇️
frontend/src/js/controllers/profileCtrl.js	66.50% <54.48%> (-26.35%)	⬇️
...ntend/src/js/controllers/challengeHostTeamsCtrl.js	70.50% <66.66%> (-1.18%)	⬇️
frontend/src/js/controllers/teamsCtrl.js	71.17% <75.00%> (ø)
frontend/src/js/controllers/challengeListCtrl.js	93.93% <98.07%> (-0.75%)	⬇️
frontend/src/js/controllers/ChallengeInviteCtrl.js	100.00% <100.00%> (ø)
... and 7 more

... and 63 files with indirect coverage changes

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