Use entry.as_dict() in IQVIA diagnostics

[bachya]

Proposed change

AirVisual manually included snippets of the config entry in diagnostics; this PR includes the whole thing (properly redacted). In so doing, it also redacts some values that users will likely want to be kept private.

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: N/A
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Checklist

• The code change is tested and works locally.
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[bachya]

Thanks, @thecode!