Add APIs for customizing the width of the Select dropdown

[rolfsmeds]

Describe your motivation

The Select component lacks APIs similar to those in ComboBox for setting the overlay width:

• A style property
• A Flow setter

Describe the solution you'd like

• Add a style property corresponding to the one in vaadin-combo-box: --vaadin-select-overlay-width
• Add a Flow ComboBox setter similar to the one in ComboBox: setOverlayWidth(String width) (see API for setting dropdown popup overlay width flow-components#2331)
• Add documentation for this to https://vaadin.com/docs/latest/components/select, corresponding to that for Combo Box

Describe alternatives you've considered

No response

Additional context

No response

[web-padawan]

Note, the default min-width is currently set to --vaadin-select-text-field-width and we should keep that as a fallback.

[web-padawan]

Related: #707 (the use case described there could be achieved by using --vaadin-select-overlay-width: auto).