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

❌ 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).
⚠️ Report is 333 commits behind head on master.

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.