[bugfix] Fix broken interface autodetection and matching logic

[fako1024]

Addresses several issues introduced with recent refactoring (partly caused by AI I suspect 😉):

• Fix positive interface [regexp] matching for IfaceConfig (was not being executed properly)
• Fix negative interface [regexp] exclusion for autodetection (was still trying to establish logic based on IfaceConfig instances no longer existing)
• Introduce config validation steps for autodetection logic
• Fix tests to actually test the relocated autodetection logic
• Removed some redundant tracking of autodetection in duplicate CaptureManager struct members

Also:

• Drive-by: Hopefully fix the version tagging in [Docker] builds
• Drive-by: Address some Linter-found issues (maybe Linter wasn't run properly on introduced viper / cobra code)

Closes #421

[els0r]

The regex excludes round up the feature pretty nicely. Thanks!