Add shutter group to HomematicIP Cloud

[SukramJ]

Proposed change

Add shutter group to HomematicIP Cloud

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:
• 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

[codecov]

Codecov Report

Merging #31916 into dev will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev   #31916      +/-   ##
==========================================
+ Coverage   94.69%   94.69%   +<.01%     
==========================================
  Files         763      763              
  Lines       55183    55193      +10     
==========================================
+ Hits        52255    52265      +10     
  Misses       2928     2928

Impacted Files	Coverage Δ
...omeassistant/components/homematicip_cloud/cover.py	100% <100%> (ø)	⬆️
homeassistant/bootstrap.py	72.78% <0%> (+0.16%)	⬆️

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[springstan]

LGTM 👌

[springstan]

@SukramJ please update the documentation accordingly :)

[SukramJ]

Groups are not documented for HomematicIP Cloud (same as hue, doconz), so there is no open task, and i think this is not required. But thanks for taking care of it.