Apply quick-fixes and fix typos

[fwendland]

A bit of clean up for code quality and reduced compiler warnings.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.53%. Comparing base (105ee6b) to head (c660623).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...tlin/de/fraunhofer/aisec/cpg/passes/GoExtraPass.kt	66.66%	1 Missing and 2 partials ⚠️
...er/aisec/cpg/frontends/golang/ExpressionHandler.kt	33.33%	1 Missing and 1 partial ⚠️
...fer/aisec/cpg/passes/GoEvaluationOrderGraphPass.kt	0.00%	2 Missing ⚠️
...r/aisec/cpg/frontends/golang/DeclarationHandler.kt	0.00%	1 Missing ⚠️
...er/aisec/cpg/frontends/golang/GoStandardLibrary.kt	0.00%	1 Missing ⚠️
...aisec/cpg/frontends/golang/SpecificationHandler.kt	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (50.00%) is below the target coverage (75.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

Files with missing lines	Coverage Δ
...raunhofer/aisec/cpg/frontends/golang/GoLanguage.kt	69.09% <ø> (ø)
...r/aisec/cpg/frontends/golang/GoLanguageFrontend.kt	91.47% <100.00%> (ø)
...fer/aisec/cpg/frontends/golang/StatementHandler.kt	86.29% <100.00%> (ø)
...r/aisec/cpg/frontends/golang/DeclarationHandler.kt	91.20% <0.00%> (ø)
...er/aisec/cpg/frontends/golang/GoStandardLibrary.kt	73.42% <0.00%> (ø)
...aisec/cpg/frontends/golang/SpecificationHandler.kt	81.02% <0.00%> (ø)
...er/aisec/cpg/frontends/golang/ExpressionHandler.kt	88.18% <33.33%> (ø)
...fer/aisec/cpg/passes/GoEvaluationOrderGraphPass.kt	55.55% <0.00%> (ø)
...tlin/de/fraunhofer/aisec/cpg/passes/GoExtraPass.kt	84.07% <66.66%> (+1.92%)	⬆️

... and 1 file with indirect coverage changes

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[oxisto]

LGTM, smaller things