ci(lint): enable testifylint linter

[mmorel-35]

This PR enables and fixes testifylint linter to use best practices concerning testify

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.06%. Comparing base (3dc1cd6) to head (72b21b3).
Report is 65 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4010      +/-   ##
==========================================
- Coverage   99.21%   99.06%   -0.16%     
==========================================
  Files          42       44       +2     
  Lines        3182     2772     -410     
==========================================
- Hits         3157     2746     -411     
+ Misses         17       15       -2     
- Partials        8       11       +3     

Flag	Coverage Δ
	?
-tags "sonic avx"	99.05% <ø> (?)
-tags go_json	99.05% <ø> (?)
-tags nomsgpack	99.04% <ø> (?)
go-1.18	?
go-1.19	?
go-1.20	?
go-1.21	99.06% <ø> (-0.16%)	⬇️
go-1.22	99.06% <ø> (?)
macos-latest	99.06% <ø> (-0.16%)	⬇️
ubuntu-latest	99.06% <ø> (-0.16%)	⬇️

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[mmorel-35]

@thinkerou , @appleboy ,
Would you like to review this pr ?