Fix goodwe export limit unit on single phase DT inverters

[mletenay]

Proposed change

Single phase inverters of DT protocol family (D-NS, XS) use Watts as grid export limit value
(in contrast to % of nominal power for 3 phase inverters).
This fix corrects the improper behavior of using always % and actually forcing limit to be just 100 Watts.
Code was fixed both in HA number descriptor detection and also
in the underlying library https://github.com/marcelblijleven/goodwe/releases/tag/v0.2.29

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)
• 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 GoodWe inverter Power limit value at 100W after restart of HA #89859
• This PR is related to issue:
• Link to documentation pull request:

Checklist

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[home-assistant]

Hey there @starkillerOG, mind taking a look at this pull request as it has been labeled with an integration (goodwe) you are listed as a code owner for? Thanks!

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[emontnemery]

LGTM