[packaging] Exclude also the submodules of test and docs (ESPTOOL-927)

[befeleme]

When running the wheel build of esptool 4.8.0 in Fedora, the docs/en/conf.py and test/efuse_scripts/*.py were included in the distribution.

Apparently, setuptools excludes only the first level of modules, unless specified otherwise. Following the official documentation, the Important part, adding asterisks to exclude all the found submodules does the trick
https://setuptools.pypa.io/en/latest/userguide/package_discovery.html#finding-simple-packages

I've tested it during the Fedora RPM build and verified this change works for us.

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