Update Growatt server URLs

[chenjiayi8]

Breaking change

Proposed change

I contacted Growatt IT department, they provide these URLs for users from different regions:

"https://openapi-cn.growatt.com/", # Chinese server "https://openapi-us.growatt.com/", # North American server "https://openapi.growatt.com/", # Other regional server: e.g. Europe

The servers are hosted in specific regions to comply with local regulations. As a result, it is not recommended to use "https://server.growatt.com/" outside of China.

Type of change

• [ ] Dependency upgrade
• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New integration (thank you!)
• [ ] New feature (which adds functionality to an existing integration)
• [ ] Deprecation (breaking change to happen in the future)
• [ ] 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 #109081, #107721, #104413, #103833, #103296
• This PR is related to issue: growatt server url
• Link to documentation pull request: https://github.com/home-assistant/home-assistant.io/pull/31137

Checklist

• [x] The code change is tested and works locally.
• [x] Local tests pass. Your PR cannot be merged unless tests pass
• [x] There is no commented out code in this PR.
• [x] I have followed the development checklist
• [x] I have followed the perfect PR recommendations
• [x] The code has been formatted using Ruff (ruff format homeassistant tests)
• [ ] Tests have been added to verify that the new code works.

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

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

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• [x] 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.
• [ ] For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
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[chenjiayi8]

Documentary is updated in (https://github.com/home-assistant/home-assistant.io/pull/31137)

[frenck]

Duplicate of #107498 and many others.

Please provide extensive details and information for these changes in the PR description.

../Frenck

[marcovtwout]

@frenck This PR is actually well described, in contrary to the other ones that are also abandoned by its authors. Lets work to make this one be the one that finally gets reviewed and integrated.