This ensures that not only the array values being compared are equal, but also that their type is the same.
These new methods replace most of the existing instances of `assertEqualSets()` and `assertEqualSetsWithIndex()`.
Going forward, stricter type checking by using `assertSameSets()` or `assertSameSetsWithIndex()` should generally be preferred, to make the tests more reliable.
Follow-up to [48937].
See #38266.
git-svn-id: https://develop.svn.wordpress.org/trunk@48939 602fd350-edb4-49c9-b593-d223f7449a82