Skip semantic analysis of source files to prevent mypy from crashing

[woswos]

This MR provides a workaround for mypy crashing while building #1539

Definition of the --no-analysis flag:

Don’t perform semantic analysis of source files. This may generate worse stubs – in particular, some module, class, and function aliases may be represented as variables with the Any type. This is generally only useful if semantic analysis causes a critical mypy error.

https://mypy.readthedocs.io/en/stable/stubgen.html#cmdoption-stubgen-no-analysis