[Rule change] avoid-global-state to support static fields

[ookami-kb]

What rule do you want to change?

avoid-global-state

How will the change be implemented? (New option, new default behavior, etc.)?

According to the documentation example, this code should trigger the rule:

class Foo {
  static int? bar; // LINT
}

As discussed in tg group, this is currently not implemented but it's on the roadmap. Creating the issue to keep track of it.

Please provide some example code that this change will affect:

class Foo {
  static int? bar; // LINT
}

What does the rule currently do for this code?

Nothing.

What will the rule do after it's changed?

Trigger rule.

Are you willing to submit a pull request to implement this change?

Probably.

[dkrutskikh]

Available in 4.9.1 release 🚀