[7.x] [Logs UI] Unskip log highlight api integration test (#71058) (#…

…71442)

Backports the following commits to 7.x:
 - [Logs UI] Unskip log highlight api integration test (#71058)

x-pack/test/api_integration/apis/metrics_ui/log_entry_highlights.ts

@@ -122,9 +122,7 @@ export default function ({ getService }: FtrProviderContext) {
           });
         });
 
-        // Skipped since it behaves differently in master and in the 7.X branch
-        // See https://github.com/elastic/kibana/issues/49959
-        it.skip('highlights field columns', async () => {
+        it('highlights field columns', async () => {
           const { body } = await supertest
             .post(LOG_ENTRIES_HIGHLIGHTS_PATH)
             .set(COMMON_HEADERS)