add support for screen reader users for simple suggest widget

[meganrogge]

fix #235022

copied from SuggestWidget and the below , which is downstream used by SuggestWidget

vscode/src/vs/editor/browser/controller/editContext/native/screenReaderSupport.ts

Lines 157 to 170 in 8c3327a

	public setAriaOptions(options: IEditorAriaOptions): void {
	if (options.activeDescendant) {
	this._domNode.setAttribute('aria-haspopup', 'true');
	this._domNode.setAttribute('aria-autocomplete', 'list');
	this._domNode.setAttribute('aria-activedescendant', options.activeDescendant);
	} else {
	this._domNode.setAttribute('aria-haspopup', 'false');
	this._domNode.setAttribute('aria-autocomplete', 'both');
	this._domNode.removeAttribute('aria-activedescendant');
	}
	if (options.role) {
	this._domNode.setAttribute('role', options.role);
	}
	}