Improved behavior for accepting EULA. (#12453)

* working version of overloading "select" button

* promptForEula to use showErrorMessage

* make parameter optional in promptForEula

* remove test code

* PR feedback

* eula to EULA

* minor fix

extensions/azdata/src/extension.ts

@@ -60,6 +60,7 @@ export async function activate(context: vscode.ExtensionContext): Promise<azdata
 
 	return {
 		isEulaAccepted: () => !!context.globalState.get<boolean>(constants.eulaAccepted),
+		promptForEula: (onError: boolean = true): Promise<boolean> => promptForEula(context.globalState, true /* userRequested */, onError),
 		azdata: {
 			arc: {
 				dc: {