Given an integer array arr, return the length of a maximum size turbulent subarray of arr. A subarray is turbulent if the comparison sign flips between each adjacent pair of elements in the subarray. More formally, a subarray [arr[i], arr[i + 1], ..., arr[j]] of arr is said to be turbulent if and only if: For i arr[k + 1] when k is odd, and arr[k] arr[k + 1] when k is even, and arr[k] arr2 arr4 < arr5