Add more Fritz sensors for DSL connections (#53198)

* Update sensor.py

Added information about the upstream line accorrding to fritzconnection library (available since V1.5.0) .
New information available are line sync speed,, noise margin and power attenuation.

Tested with ADSL and VDSL lines on fritzbox 7590, 7490 and 7390. 
Not tested on cable internet / fiber. According to upstrem library should also work / fail gracefully.

* Update sensor.py

Fixed errors from automated tests
Sorry it took so long

* Update homeassistant/components/fritz/sensor.py

Thank you this sounds even better

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* Update homeassistant/components/fritz/sensor.py

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

* black & mypy fixes

* Rebase, fix multiplier, add conditional create

Co-authored-by: Simone Chemelli <simone.chemelli@gmail.com>

homeassistant/components/fritz/const.py

@@ -6,6 +6,8 @@ PLATFORMS = ["binary_sensor", "device_tracker", "sensor", "switch"]
 
 DATA_FRITZ = "fritz_data"
 
+DSL_CONNECTION = "dsl"
+
 DEFAULT_DEVICE_NAME = "Unknown device"
 DEFAULT_HOST = "192.168.178.1"
 DEFAULT_PORT = 49000