Enable clippy for integration tests

[shivanshuraj1333]

Fixes: #2470

ToDo:

1. There are a couple of failure due to this lint check.
2. Enable linter wherever possible apart from the crates

Will open up the PR for review after addressing 1 and 2.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.9%. Comparing base (888d5a3) to head (dd80467).
Report is 111 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2509   +/-   ##
=====================================
  Coverage   77.9%   77.9%           
=====================================
  Files        123     123           
  Lines      22943   22943           
=====================================
  Hits       17875   17875           
  Misses      5068    5068           

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[gruebel]

@cijothomas both this and #2470 can be closed. It was fixed via PR #2674