[7.x] [Telemetry][API Integration] size_in_bytes to be a number (#74664) (#74741)

Author: afharo

test/api_integration/apis/telemetry/telemetry_local.js

@@ -90,7 +90,7 @@ export default function ({ getService }) {
       expect(stats.stack_stats.data[0].index_count).to.be(1);
       expect(stats.stack_stats.data[0].doc_count).to.be(0);
       expect(stats.stack_stats.data[0].ecs_index_count).to.be(0);
-      expect(stats.stack_stats.data[0].size_in_bytes).to.be.greaterThan(0);
+      expect(stats.stack_stats.data[0].size_in_bytes).to.be.a('number');
     });
 
     it('should pull local stats and validate fields', async () => {