re-add pub-sub to mqtt5 samples and remove unused greengrass testing files

Author: sbSteveK

.github/workflows/ci_run_greengrass_discovery_cfg.json

@@ -9,6 +9,7 @@ add_subdirectory(fleet_provisioning/provision-csr)
 add_subdirectory(greengrass/ipc)
 add_subdirectory(greengrass/basic_discovery)
 add_subdirectory(jobs/jobs-sandbox)
+add_subdirectory(mqtt5/mqtt5_pubsub)
 add_subdirectory(secure_tunneling/secure_tunnel)
 add_subdirectory(secure_tunneling/tunnel_notification)
 add_subdirectory(shadow/shadow_sync)

.github/workflows/ci_run_greengrass_ipc_cfg.json

@@ -8,7 +8,6 @@
     + [Direct MQTT with Custom Authentication](./mqtt5/mqtt5_pubsub/README.md#direct-mqtt-with-custom-authentication)
     + [MQTT over Websockets with Cognito](./mqtt5/mqtt5_pubsub/README.md#mqtt-over-websockets-with-cognito)
     + [HTTP Proxy](./mqtt5/mqtt5_pubsub/README.md#http-proxy)
-* [Mqtt5 Shared Subscription](./mqtt5/mqtt5_shared_subscription/README.md)
 ## Other Samples
 * [Jobs Sandbox](./jobs/jobs-sandbox/README.md)
 * [Shadow Sandbox](./shadow/shadow-sandbox/README.md)