[CI] Forbid LCOV suppressions in the codebase

[aobolensk]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.03%. Comparing base (847e64e) to head (0388d04).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #680   +/-   ##
=======================================
  Coverage   94.03%   94.03%           
=======================================
  Files          15       15           
  Lines         486      486           
  Branches      176      181    +5     
=======================================
  Hits          457      457           
  Partials       29       29           

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