[feat] `InputSelect` and `InputSelectize` 's `.expect_choices()` should handle values, labels, and groups

[schloerke]

The root of the problem is that we can not test which values belong in which labels. Only that their order (and count) is valid.

Proposal:

It should support:

    select_with_custom_size_and_dict.expect_choices({
        "Citrus": {
            "Orange": "Sweet and tangy",
            "Lemon": "Zesty and refreshing",
            "Lime": "Bright and tart",
        },
        "Berries": {
            "Strawberry": "Juicy and sweet",
            "Blueberry": "Tiny and antioxidant-rich",
            "Raspberry": "Delicate and slightly tart",
        },
    })

Internally, if a value array is supplied, then it is auto upgraded to a {value: label} dictionary. Ex:

    select_with_custom_size_and_dict.expect_choices([
        "Orange",
        "Lemon",
        "Lime",
        "Strawberry",
        "Blueberry",
        "Raspberry",
    ])

is auto upgraded to: (which also asserts that there are no groups)

    select_with_custom_size_and_dict.expect_choices({
        "Orange": "Orange",
        "Lemon": "Lemon",
        "Lime": "Lime",
        "Strawberry": "Strawberry",
        "Blueberry": "Blueberry",
        "Raspberry": "Raspberry",
    })

And

    select_with_custom_size_and_dict.expect_choices({
        "Citrus": [
            "Orange",
            "Lemon",
            "Lime",
        ],
        "Berries": [
            "Strawberry",
            "Blueberry",
            "Raspberry",
        ],
    })

to:

    select_with_custom_size_and_dict.expect_choices({
        "Citrus": {
            "Orange": "Orange",
            "Lemon": "Lemon",
            "Lime": "Lime",
        },
        "Berries": {
            "Strawberry": "Strawberry",
            "Blueberry": "Blueberry",
            "Raspberry": "Raspberry",
        },
    })

Groups:

• If no groups are provided, then assert there are no groups
• If groups are provided, then assert as expected

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However, this will require the deprecation of .expect_choice_labels() and .expect_choice_groups().