DropDownTree does not comply to ARIA spec and general ARIA requirements

[aleksandarevangelatov]

Bug report

• DDT has its role set to listbox (must be combobox)
• The filter input has aria-haspopup=list (must be tree)
• The .k-input-inner receives role=option when at least one item is selected in DDT with checkboxes
• The .k-chiplist receives role=none (when empty selection)

Environment

• Kendo UI version: 2023.1.314
• Browser: [all]