test(combobox-web): type the lazy loading props in the component specs

The lazy loading scenario in SingleSelection and MultiSelection built an
untyped props object with an enum cast. It is now a ComboboxContainerProps
and the cast and its import are gone.

Author: r0b1n

packages/pluggableWidgets/combobox-web/src/__tests__/MultiSelection.spec.tsx

@@ -13,7 +13,7 @@ import {
     ReferenceSetValueBuilder,
     setupIntersectionObserverStub
 } from "@mendix/widget-plugin-test-utils";
-import { ComboboxContainerProps, OptionsSourceAssociationCaptionTypeEnum } from "../../typings/ComboboxProps";
+import { ComboboxContainerProps } from "../../typings/ComboboxProps";
 import Combobox from "../Combobox";
 
 async function getInput(component: RenderResult): Promise<HTMLInputElement> {
@@ -437,10 +437,10 @@ describe("Combo box (Association)", () => {
     describe("with lazy loading", () => {
         it("calls loadMore only when menu opens", async () => {
             const setLimit = jest.fn();
-            const lazyLoadingProps = {
+            const lazyLoadingProps: ComboboxContainerProps = {
                 ...defaultProps,
                 lazyLoading: true,
-                optionsSourceAssociationCaptionType: "attribute" as OptionsSourceAssociationCaptionTypeEnum,
+                optionsSourceAssociationCaptionType: "attribute",
                 optionsSourceAssociationDataSource: {
                     ...defaultProps.optionsSourceAssociationDataSource,
                     hasMoreItems: true,

packages/pluggableWidgets/combobox-web/src/__tests__/SingleSelection.spec.tsx

@@ -13,7 +13,7 @@ import {
     ReferenceValueBuilder,
     setupIntersectionObserverStub
 } from "@mendix/widget-plugin-test-utils";
-import { ComboboxContainerProps, OptionsSourceAssociationCaptionTypeEnum } from "../../typings/ComboboxProps";
+import { ComboboxContainerProps } from "../../typings/ComboboxProps";
 import Combobox from "../Combobox";
 
 // function helper to ease DOM changes in development
@@ -172,10 +172,10 @@ describe("Combo box (Association)", () => {
     describe("with lazy loading", () => {
         it("calls loadMore only when menu opens", async () => {
             const setLimit = jest.fn();
-            const lazyLoadingProps = {
+            const lazyLoadingProps: ComboboxContainerProps = {
                 ...defaultProps,
                 lazyLoading: true,
-                optionsSourceAssociationCaptionType: "attribute" as OptionsSourceAssociationCaptionTypeEnum,
+                optionsSourceAssociationCaptionType: "attribute",
                 optionsSourceAssociationDataSource: {
                     ...defaultProps.optionsSourceAssociationDataSource,
                     hasMoreItems: true,