Gracefully handle webhook unsubscription if error occurs while contacting Withings

[dcmeglio]

Proposed change

Reorders code so we don't get into a state where local operations succeed but network operations fail due to network issues.

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 132564
• 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

• 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.
  I can't think of a way to test this yet
  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.
• For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

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

[home-assistant]

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

Code owner commands

Code owners of withings can trigger bot actions by commenting:

• @home-assistant close Closes the pull request.
• @home-assistant rename Awesome new title Renames the pull request.
• @home-assistant reopen Reopen the pull request.
• @home-assistant unassign withings Removes the current integration label and assignees on the pull request, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the pull request.
• @home-assistant remove-label needs-more-information Remove a label (needs-more-information, problem in dependency, problem in custom component) on the pull request.