Improved annotation parsing in python

[oxisto]

This fixes at least most of the errors when parsing glance. Fixes #1749

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.67568% with 9 lines in your changes missing coverage. Please review.

Project coverage is 74.85%. Comparing base (bd596ed) to head (96ddfbe).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...fer/aisec/cpg/frontends/python/StatementHandler.kt	75.67%	6 Missing and 3 partials ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
...fer/aisec/cpg/frontends/python/StatementHandler.kt	79.56% <75.67%> (-0.21%)	⬇️

... and 1 file with indirect coverage changes

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