Formatter: Parenthesize long expressions in calls

[zanieb]

Stable formatting of calls with a long expression results in a wrap that reduces readability

Unformatted:

if True:
    ___ = dict(
        x="---",
        y="----------------------------------------------------------" if True else None,
        z="---",
    )

Formatted:

if True:
    ___ = dict(
        x="---",
        y="----------------------------------------------------------"
        if True
        else None,
        z="---",
    )

Adding parenthesis results in more readable code. Black's preview style does so.

if True:
    ___ = dict(
        x="---",
        y=(
            "----------------------------------------------------------"
            if True
            else None
        ),
        z="---",
    )

With a shorter line, Ruff retains parenthesis when the lines are collapsed:

if True:
    ___ = dict(
        x="---",
        y=("---------------------------------------------" if True else None),
        z="---",
    )

However, these parenthesis should be removed as they are superfluous.

Black's preview style will not remove these parenthesis for calls, but probably should.

Note Black's preview style will remove these parenthesis for dict literals, see #8437 but will not for list literals, see #8438

See also psf/black#620 psf/black#3440 psf/black#3510

[MichaReiser]

I merge this into #8438 because conditional expression should be parenthesized in call contexts (as far as I understand)