refactor(resources)!: unify resource interfaces

[david-luna]

Which problem is this PR solving?

This PR removes the deprecated DetectorAsync interface and also simplifies the IResource interfaces and Resource class implementation.

Fixes #3582

Short description of the changes

• IResource refactored to have an async property (attributes).
• refactored Resource class to comply with the new interface
• adapted test for the new interface and implementation
• remove test about sync attributes

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

TODO:

Checklist:

• Followed the style guidelines of this project
• Unit tests have been adapted
• Documentation has been updated