Update binary_sensor.py for new binary sensor "Rain State Piezo"

[smuliv]

Add sensor "Rain State Piezo" (srain_piezo).

aioecowitt (https://github.com/home-assistant-libs/aioecowitt) has to be updated too.

Proposed change

Add new binary sensor Rain State Piezo and get rid of the error message:
WARNING (MainThread) [aioecowitt.server] Unhandled sensor type srain_piezo value 0

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

aioecowitt (https://github.com/home-assistant-libs/aioecowitt) must to be updated too because of dependency.
PR home-assistant-libs/aioecowitt#202 submitted
PR home-assistant-libs/aioecowitt#203 submitted

• This PR fixes or closes issue: Add new field "srain_piezo" home-assistant-libs/aioecowitt#200 & [ECOWITT] rain start detection binary sensor support #125850

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
• I have followed the perfect PR recommendations
• The code has been formatted using Ruff (ruff format homeassistant tests)
• Tests have been added to verify that the new code works.

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

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  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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[home-assistant]

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[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[home-assistant]

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

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Stale

[joostlek]

This PR is still awaiting the dependency, and the dependency to be bumped in HA. Please recreate it when that has happened as we can't merge this right now