[Fix #12380] Make Style/RedundantParentheses aware of lambda or proc

[koic]

Fixes #12380.

This PR makes Style/RedundantParentheses aware of lambda or proc.

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[anton-co]

@koic This doesn't seem to work correctly. In one project, all scopes that look like this:

scope :my_scope,
      (lambda do
        where(column: :value)
      end)

Formatted into this:

scope :my_scope,
      -> { lambda } do
        where(column: :value)
      end

And this:

scope :my_scope, (lambda do
  where(column: :value)
end)

Into this:

scope :my_scope, -> { lambda } do
  where(column: :value)
end

I mean the situation when there are several lines in the body of a lambda. It's not possible in one line.

[koic]

@anton-co Right! I've opened #12505 to resolve the issue. Thank you for the feedback!