fix(linter): fix some cases on AssignmentExpression for unicorn/consistent-function-scoping

[Arian94]

This is to fix the cases mentioned in the comment section of #5365.

In short, it will report these as PASS test cases:

let inner;

function foo1() {
  inner = function() {}
}
function foo2() {
  inner = function() {}
}

let inner;

function outer() {
  inner = function() {}
}

And report these below as FAIL test cases:

let inner;

function foo1() {
  inner = function smth() {}
}
function foo2() {
  inner = function bar() {}
}

let inner;

function outer() {
  inner = function inner() {}
}

The case below was already done in #5312 but mentioned in #5365. It is a FAIL case as well:

function outer() {
  const inner = function inner() {}
}

[graphite-app]

Your org has enabled the Graphite merge queue for merging into main

Add the label “0-merge” to the PR and Graphite will automatically add it to the merge queue when it’s ready to merge. Or use the label “hotfix” to add to the merge queue as a hot fix.

You must have a Graphite account and log in to Graphite in order to use the merge queue. Sign up using this link.

[codspeed-hq]

CodSpeed Performance Report

Merging #5675 will not alter performance

_{Comparing Arian94:fix/5365 (6fe5d7b) with main (52c6409)}

Summary

✅ 29 untouched benchmarks

[DonIsaac]

LGTM, @camc314 wanna merge this when you've had a chance to review it?