Embed RainMachine platforms into the component (#20066)

* Embed RainMachine platforms into the component

* Updated CODEOWNERS

* Updated .coveragerc

.coveragerc

@@ -303,7 +303,9 @@ omit =
     homeassistant/components/*/raincloud.py
 
     homeassistant/components/rainmachine/__init__.py
-    homeassistant/components/*/rainmachine.py
+    homeassistant/components/rainmachine/binary_sensor.py
+    homeassistant/components/rainmachine/sensor.py
+    homeassistant/components/rainmachine/switch.py
 
     homeassistant/components/raspihats.py
     homeassistant/components/*/raspihats.py

CODEOWNERS

@@ -230,7 +230,6 @@ homeassistant/components/*/qwikswitch.py @kellerza
 
 # R
 homeassistant/components/rainmachine/* @bachya
-homeassistant/components/*/rainmachine.py @bachya
 homeassistant/components/*/random.py @fabaff
 homeassistant/components/*/rfxtrx.py @danielhiversen