feat(ui): Added link-button to ui-libs. (TV-855)

Squashed commit of the following:

commit 1aab96d7f243c77adbd806196f76b931f4445976
Author: Erik Tiekstra <erik.tiekstra@arbetsformedlingen.se>
Date:   Thu Oct 28 11:38:05 2021 +0200

    Added digi-link component to ui lib

libs/ui/link-button/link-button.component.spec.ts

@@ -0,0 +1,26 @@
+/* tslint:disable:no-unused-variable */
+import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { LinkButtonComponent } from './link-button.component';
+
+describe('LinkButtonComponent', () => {
+  let component: LinkButtonComponent;
+  let fixture: ComponentFixture<LinkButtonComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      declarations: [LinkButtonComponent],
+      schemas: [CUSTOM_ELEMENTS_SCHEMA],
+    }).compileComponents();
+  });
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(LinkButtonComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});