Add typing to references of stream and stream()

[DanielNoord]

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Type of Changes

	Type
✓	🔨 Refactoring

Description

The next instalment of breaking up #4954 into more manageable PR's.
This PR is based on two related commits which I felt should be part of the same PR as they deal with a similar topic.

The first is annotation of all implementations of process_module. This is fairly straightforward and covers adding nodes.Module to the typing of the parameter and changing module, astroid and other parameter names to the new standard of node. As process_module calls node.stream() often this seemed like a good first step to this PR.

The second commit covers annotation of (most) functions with a reference to stream, filestream or a similar parameter. There are two important comments about this commit.

The first is for pylint/checkers/similar.py where I choose to use STREAM_TYPES = Union[TextIO, BufferedReader, BytesIO]. I did this because there seems to be a certain particularity with TextIO and IOBase. See the (small) discussion here: python/typeshed#3225 In practice this means that return types of open("b") and open("t") are incompatible. This became problematic and is why I opted to introduce STREAM_TYPES. This also means that typing is a little more restrictive than using IOBase although in practice this probably won't make a real difference.

The second is that in pylint/utils/utils.py I don't fully type the options parameter and use Tuple. This is because trying to determine the type of the second argument of this tuple became difficult and I didn't want to overstretch this PR. If we turn on some of the more stricter flags of mypy in the future this will probably show up again and should be solved then.

[coveralls]

Pull Request Test Coverage Report for Build 1214721205

• 55 of 60 (91.67%) changed or added relevant lines in 13 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 93.13%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pylint/checkers/misc.py	8	9	88.89%
pylint/checkers/similar.py	7	8	87.5%
pylint/config/man_help_formatter.py	0	1	0.0%
pylint/lint/pylinter.py	7	8	87.5%
pylint/testutils/lint_module_test.py	7	8	87.5%

Totals
Change from base Build 1214643287:	0.02%
Covered Lines:	13258
Relevant Lines:	14236

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💛 - Coveralls

[Pierre-Sassoulas]

Lgtm :)

[Pierre-Sassoulas]

👍