Fix Python JSII bug where strings are being taken as forwarded type declarations

[DanielMSchmidt]

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Expected Behavior

JSII should work with unions

Actual Behavior

It does not, see reference context below. We disabled the python/edge tests and need to re-enable them once the next version of JSII ships

Steps to Reproduce

Important Factoids

References

• Context of the error: https://gist.github.com/DanielMSchmidt/e871aed648219d3045ce0cc2f298d3f5

[DanielMSchmidt]

This was fixed in aws/jsii#3866 and released in JSII 1.72.0

[github-actions]

I'm going to lock this issue because it has been closed for 30 days. This helps our maintainers find and focus on the active issues. If you've found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.