False positive superfluous-parens with walrus operator

[otchita]

I've came across a superfluous-parens false positive when using the walrus operator:

Steps to reproduce

Given a file test.py:

"""Test example."""
if (var := 3) in [1, 2, 3]:
    print('Hello world !')

We obtain the following:

Current behavior

Result of pylint test.py:

************* Module test
test.py:2:0: C0325: Unnecessary parens after 'if' keyword (superfluous-parens)

Expected behavior

Normally, this should not raise any errors as the use of parentheses here is relevant. Because, otherwise the value of var will be the inclusion boolean instead of the value itself.

pylint --version output

Result of pylint --version output on my local macOS:

pylint 2.7.4
astroid 2.5.2
Python 3.8.8 (v3.8.8:024d8058b0, Feb 19 2021, 08:48:17) 
[Clang 6.0 (clang-600.0.57)]