Combobox - Select component refactoring

[Andrevmatias]

Due to the large number of issues for the Select component, we are refactoring it to the new Combobox component.
This new Combobox component is built using the new useCombobox downshift hook instead of the <Downshift /> component Select currently uses.

The idea is to use extensive jest tests to cover all scenarios and currently open bugs.

The new component should be compatible with all the Select component properties and specifications and this refactoring should address:

• [Select] Update select behavior #466
• [Select multiple] Add 'arrowDown' icon to Select multiple input #519
• [Select] Change the Select's result box behaviour when it's rendered above the field #520
• [SelectField] Component is auto-selecting the previous selected item when altering the filter #532
• [Multi select] Allow removal of text entered by the user after selecting an item. #581
• [SelectInline] Selected item is not presented in the filed when thelist is closed. #586
• [SelectInline] Make the search field optional #607
• [SelectInline] Dropdown unexpected behavior when used in Modal #608
• [SelectMulti] Add icon to input #761
• [Select] After selecting a new value, the list does not open by clicking the arrow button #811

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Migration

The Select component will be kept in the codebase allowing users to gradually change from Select to Combobox component.

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Tasks

• [Combobox] Basic Combobox #621 - Implement a simple, ARIA compliant, single-select component using the useCombobox hook
• [Combobox] Single Select Combobox #627 - Implement a single-select component accordingly to the specifications
• [Combobox] Combobox with custom components #648 - Add support to custom components
• [Combobox] "Suggestion" behaviour #652 - Implement "suggestion" component
• [Combobox] Async load items #661 - Add support to async load items
• [Combobox] Implement a multi-select component accordingly to the specifications #687
• [Combobox] Implement a inline-select component accordingly to the specifications #764
• [Combobox] Implement support to all Select props #804
• [Combobox] Migrate Select tests to Combobox tests #812
• Implement tests for each bug/problem found for the Select component #823
• Upgrade Downshift to the latest version #822