Avoid Dispose[Async]() from being called multiple times.

[FrankBakkerNl]

Proposed change

Avoid DisposeAsync from being called multiple times.

If an app implements both IDisposable AND IAsyncDisposable we will now only call DisposeAsync
Also solved a bug where Dispose and or DisposeAsync were actually called twice making 4 calls total

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• 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][dev-checklist]
• The code compiles without warnings (code quality chek)
• 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

[helto4real]

Good!