packages,plugins: migrate to using TestApiProvider and Registry

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/kafka/src/components/ConsumerGroupOffsets/useConsumerGroupsOffsetsForEntity.test.tsx

@@ -26,8 +26,8 @@ import {
 import { useConsumerGroupsOffsetsForEntity } from './useConsumerGroupsOffsetsForEntity';
 import * as data from './__fixtures__/consumer-group-offsets.json';
 
-import { ApiProvider, ApiRegistry } from '@backstage/core-app-api';
 import { errorApiRef } from '@backstage/core-plugin-api';
+import { TestApiProvider } from '@backstage/test-utils';
 
 const consumerGroupOffsets = data as ConsumerGroupOffsetsResponse;
 
@@ -59,14 +59,14 @@ describe('useConsumerGroupOffsets', () => {
 
   const wrapper = ({ children }: PropsWithChildren<{}>) => {
     return (
-      <ApiProvider
-        apis={ApiRegistry.with(errorApiRef, mockErrorApi).with(
-          kafkaApiRef,
-          mockKafkaApi,
-        )}
+      <TestApiProvider
+        apis={[
+          [errorApiRef, mockErrorApi],
+          [kafkaApiRef, mockKafkaApi],
+        ]}
       >
         <EntityProvider entity={entity}>{children}</EntityProvider>
-      </ApiProvider>
+      </TestApiProvider>
     );
   };