Add missing motor_speed sensor for Xiaomi Miio humidifier CA1 and CB1

[bieniu]

Breaking change

Proposed change

During the humidifier rework we missed that zhimi.humidifier.ca1 and zhimi.humidifier.cb1 support the motor speed sensor. This PR adds this sensor for those humidifiers.

The dev branch is newer than rc so I'll open a separate PR to fix this in dev branch.

CC: @jbouwh

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: Xiaomi Miio Air Humidifier CA1 missing 'depth' and 'water_level' sensors since HA upgrade to 2021.8.2 #54153
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

The integration reached or maintains the following Integration Quality Scale:

• No score or internal
• 🥈 Silver
• 🥇 Gold
• 🏆 Platinum

To help with the load of incoming pull requests:

• I have reviewed two other open pull requests in this repository.

[probot-home-assistant]

This pull request needs to be manually signed off by @home-assistant/core before it can get merged.
_{^{(message by ReviewEnforcer)}}

[MartinHjelmare]

Looks good!

[MartinHjelmare]

Note that this PR is targeting rc branch. We should add the label cherry-picked after merging it.

[pieonboard]

Hi @bieniu
Thanks for this change. May I ask you to add depth sensor also in addition to motor_speed? Or I can do that after your change.

[bieniu]

@MartinHjelmare The dev branch is newer than rc, so I was targeting rc. I'll open new PR to fix this in dev.

[bieniu]

@SmaginPV Please read this #54153 (comment)

[jbouwh]

Looks good. and works with the MIOT humidifiers.

[jbouwh]

@MartinHjelmare The dev branch is newer than rc, so I was targeting rc. I'll open new PR to fix this in dev.

@bieniu You could retarget this PR against dev as well.

[MartinHjelmare]

It's correct to target rc of there would be a merge conflict to cherry-pick from dev to rc.

To not include PRs that are already merged to rc in the cherry-pick script run we add the label cherry-picked.