[Autocomplete] Use ul element for the listbox

[DiegoAndai]

Closes #44264

Explanation

The ul element was lost in this PR: #43994. Previously, it was provided via the as prop:

material-ui/packages/mui-material/src/Autocomplete/Autocomplete.js

Lines 560 to 561 in 15ea548

	const [ListboxSlot, listboxProps] = useSlot('listbox', {
	elementType: 'ul',

material-ui/packages/mui-material/src/Autocomplete/Autocomplete.js

Line 685 in 15ea548

<AutocompleteListbox as={ListboxSlot} {...listboxProps}>

But after #43994 fix, we failed to maintain it:

material-ui/packages/mui-material/src/Autocomplete/Autocomplete.js

Line 329 in 01c5f34

const AutocompleteListbox = styled('div', {

material-ui/packages/mui-material/src/Autocomplete/Autocomplete.js

Lines 559 to 560 in 01c5f34

	const [ListboxSlot, listboxProps] = useSlot('listbox', {
	elementType: AutocompleteListbox,

material-ui/packages/mui-material/src/Autocomplete/Autocomplete.js

Line 686 in 01c5f34

<ListboxSlot as={ListboxComponentProp} {...listboxProps}>

Solution

This PR brings it back by setting AutocompleteListbox's element to ul, and adds a test for it.

v5: https://codesandbox.io/p/sandbox/pr-44422-v5-x2ff5z
Before: https://codesandbox.io/p/sandbox/pr-44422-before-l66t9p
After: https://codesandbox.io/p/sandbox/pr-44422-after-cx66k3

[mui-bot]

Netlify deploy preview

https://deploy-preview-44422--material-ui.netlify.app/

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[rathpc]

@aarongarciah any idea when this will be part of a release (6.1.8 perhaps?)

[aarongarciah]

@rathpc we'll probably release 6.2.0 this week and it'll contain this change.

[rathpc]

@rathpc we'll probably release 6.2.0 this week and it'll contain this change.

Perfect, thank you for the fast reply!!

[ArmandRedgate]

A related issue that may conflict with this:

#42782