refactor: Fix revive.unnecessary-format lint issues

[alexandear]

Changes:

• Enabled the revive.unnecessary rule in golangci-lint config. This requires upgrading golangci-lint to version 2.2.2.
• Fixes assert messages in TestRepositoriesService_GetAutomatedSecurityFixes.
• Replaced t.Errorf with t.Error.
• Replaced t.Fatalf with t.Fatal.
• Replaced fmt.Fprintf with fmt.Fprint.
• Replaced log.Fatalf with log.Fatal.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 91.33%. Comparing base (18877d9) to head (76c24d6).

Files with missing lines	Patch %	Lines
example/commitpr/main.go	0.00%	1 Missing ⚠️
example/verifyartifact/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3629   +/-   ##
=======================================
  Coverage   91.33%   91.33%           
=======================================
  Files         184      184           
  Lines       16174    16174           
=======================================
  Hits        14773    14773           
  Misses       1227     1227           
  Partials      174      174           

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[gmlewis]

Thank you, @alexandear!
LGTM.
Merging.