core: PVOutput configuration flow fail

The problem

With the upgrade to core-2022.2.0b0 the migration of the old PVOutput configuration has not been successful and a new configuration dialog is presented which fails. Other auto migrations have been successful; sensibo, solax.

Log entry looks like is has been successful.

Logger: homeassistant.components.pvoutput
Source: components/pvoutput/sensor.py:139
Integration: PVOutput (documentation, issues)
First occurred: 4:16:08 PM (1 occurrences)
Last logged: 4:16:08 PM

Configuration of the PVOutput platform in YAML is deprecated and will be removed in Home Assistant 2022.4; Your existing configuration has been imported into the UI automatically and can be safely removed from your configuration.yaml file

But then unexpectedly the component is auto discovered:

But credentials are not accepted reporting ‘failed to connect’:

What version of Home Assistant Core has the issue?

core-2022.2.0b0

What was the last working version of Home Assistant Core?

core-2021.12.10

What type of installation are you running?

Home Assistant Supervised

Integration causing the issue

pvoutput

Link to integration documentation on our website

https://www.home-assistant.io/integrations/pvoutput

Example YAML snippet

Legacy YAML configuration:


- platform: pvoutput
  system_id: 79392
  api_key: XXXX
- platform: template
  sensors:
    power_consumption:
      value_template: "{% if is_state_attr('sensor.pvoutput', 'power_consumption', 'NaN') %}0{% else %}{{ state_attr('sensor.pvoutput', 'power_consumption') }}{% endif %}"
      friendly_name: "Using"
      unit_of_measurement: "Watt"
    energy_consumption:
      value_template: '{{ "%0.1f"|format(state_attr("sensor.pvoutput", "energy_consumption")|float/1000) }}'
      friendly_name: "Used"
      unit_of_measurement: "kWh"
    power_generation:
      value_template: '{% if is_state_attr("sensor.pvoutput", "power_generation", "NaN") %}0{% else %}{{ state_attr("sensor.pvoutput", "power_generation") }}{% endif %}'
      friendly_name: "Generating"
      unit_of_measurement: "Watt"
    energy_generation:
      value_template: '{% if is_state_attr("sensor.pvoutput", "energy_generation", "NaN") %}0{% else %}{{ "%0.2f"|format(state_attr("sensor.pvoutput", "energy_generation")|float/1000) }}{% endif %}'
      friendly_name: "Generated"
      unit_of_measurement: "kWh"

### Anything in the logs that might be useful for us?

```txt
Enabled debug logging, but nothing else relevant reported.


2022-01-27 21:49:21 WARNING (MainThread) [homeassistant.helpers.template] Template warning: 'float' got invalid input 'None' when rendering template '{{ "%0.1f"|format(state_attr("sensor.pvoutput", "energy_consumption")|float/1000) }}' but no default was specified. Currently 'float' will return '0', however this template will fail to render in Home Assistant core 2022.1
2022-01-27 21:49:21 WARNING (MainThread) [homeassistant.helpers.template] Template warning: 'float' got invalid input 'None' when rendering template '{{ "%0.1f"|format(state_attr("sensor.pvoutput", "energy_consumption")|float/1000) }}' but no default was specified. Currently 'float' will return '0', however this template will fail to render in Home Assistant core 2022.1
2022-01-27 21:49:21 WARNING (MainThread) [homeassistant.helpers.template] Template warning: 'float' got invalid input 'None' when rendering template '{% if is_state_attr("sensor.pvoutput", "energy_generation", "NaN") %}0{% else %}{{ "%0.2f"|format(state_attr("sensor.pvoutput", "energy_generation")|float/1000) }}{% endif %}' but no default was specified. Currently 'float' will return '0', however this template will fail to render in Home Assistant core 2022.1
2022-01-27 21:49:21 WARNING (MainThread) [homeassistant.helpers.template] Template warning: 'float' got invalid input 'None' when rendering template '{% if is_state_attr("sensor.pvoutput", "energy_generation", "NaN") %}0{% else %}{{ "%0.2f"|format(state_attr("sensor.pvoutput", "energy_generation")|float/1000) }}{% endif %}' but no default was specified. Currently 'float' will return '0', however this template will fail to render in Home Assistant core 2022.1

### Additional information

_No response_