gnulib-tool.py: Use 'Any' instead of type unions in GLConfig.

[Collin Funk]

Also, removing these large type unions and using 'Any'. I've ran all
the test cases with Python 3.7 to double check it is compatible.

If we have 'var' of type 'str | bool' and we are sure it is a string
and want to do this:

    new_var = var.split(' ')

you will see warnings from type checkers because bool doesn't have a
split method. Since these type unions are so large, Any makes more sense.

Collin

0003-gnulib-tool.py-Use-Any-instead-of-type-unions-in-GLC.patch
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