Remove elastictranscoder service's integration test (#2901)

* remove integration test for elastictranscoder

* add changelog

---------

Co-authored-by: Tianyi Wang <[email protected]>

Author: wty-Bryant

.changelog/1306bba2c2b2401da1005bb77ec7161a.json

@@ -0,0 +1,8 @@
+{
+    "id": "1306bba2-c2b2-401d-a100-5bb77ec7161a",
+    "type": "feature",
+    "description": "Remove integration test for service elastictranscoder",
+    "modules": [
+        "service/internal/integrationtest"
+    ]
+}