fix(robot-server): fix mqtt dependencies (#14384)

We need to add paho-mqtt as an install dep in our setup.py for
good-practice reasons and to fix it in the pipfile.lock. More
importantly, we need to add it as a buildroot dep in the local buildroot
toolchain file so the OT-2 gets it, since otherwise the server can't
boot because it won't be present when notification_client tries to
import it.

Closes RQA-2270

robot-server/Config.in

@@ -15,6 +15,7 @@ config BR2_PACKAGE_PYTHON_OPENTRONS_ROBOT_SERVER
   select BR2_PACKAGE_PYTHON_TYPING_EXTENSIONS # runtime
   select BR2_PACKAGE_PYTHON_UVICORN # runtime
   select BR2_PACKAGE_PYTHON_WSPROTO # runtime
+  select BR2_PACKAGE_PYTHON_PAHO_MQTT # runtime
 
   help
     Opentrons HTTP server. Controls an OT-2 robot.

robot-server/Pipfile

@@ -34,6 +34,7 @@ types-requests = "==2.25.6"
 types-mock = "==4.0.1"
 sqlalchemy2-stubs = "==0.0.2a21"
 python-box = "==5.4.1"
+types-paho-mqtt = "==1.6.0.20240106"
 
 [packages]
 anyio = "==3.6.1"

robot-server/setup.py

@@ -67,6 +67,7 @@ def get_version():
     "systemd-python==234; sys_platform=='linux'",
     "sqlalchemy==1.4.32",
     "aiosqlite==0.17.0",
+    "paho-mqtt==1.6.1",
 ]