Add tests for dataclasses

[DanielNoord]

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• Write a good description on what the PR does.

Type of Changes

	Type
✓	🐛 Bug fix

Description

This closes #4963 and is based on the fix in pylint-dev/astroid#1165

Should this be added to the changelog? I didn't think so as it is fixed in astroid.

[Pierre-Sassoulas]

I think it's ok to not have a changelog when we just add a regression test following an astroid upgrade.

[coveralls]

Pull Request Test Coverage Report for Build 1232870442

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 189 unchanged lines in 15 files lost coverage.
• Overall coverage decreased (-0.01%) to 93.084%

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Files with Coverage Reduction	New Missed Lines	%
pylint/extensions/empty_comment.py	1	96.55%
pylint/interfaces.py	1	96.97%
pylint/checkers/exceptions.py	2	96.41%
pylint/config/init.py	4	71.01%
pylint/extensions/docparams.py	4	97.7%
pylint/lint/pylinter.py	4	93.15%
pylint/message/message_handler_mix_in.py	8	95.33%
pylint/checkers/misc.py	10	82.67%
pylint/checkers/similar.py	14	96.35%
pylint/config/man_help_formatter.py	16	31.75%

Totals
Change from base Build 1201318317:	-0.01%
Covered Lines:	13258
Relevant Lines:	14243

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💛 - Coveralls