C: add names to gotos and labels

[maximiliankaul]

Fixes #1869

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 76.29%. Comparing base (d2c7f28) to head (f73e0ac).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...nhofer/aisec/cpg/graph/statements/GotoStatement.kt	0.00%	5 Missing ⚠️
...nhofer/aisec/cpg/frontends/cxx/StatementHandler.kt	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
...nhofer/aisec/cpg/frontends/cxx/StatementHandler.kt	79.77% <80.00%> (+8.51%)	⬆️
...nhofer/aisec/cpg/graph/statements/GotoStatement.kt	57.14% <0.00%> (-31.75%)	⬇️

... and 9 files with indirect coverage changes

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