What this PR changes/adds

Cleanup 0.6.x deprecations, except the ones on DataPlaneInstances, because they are bound to the management api (ref. #4578).

Details:

• removed auth-basic module
• removed canHandle method from DataSourceFactory and DataSinkFactory
• removed mapTo methods from Result (replaced by mapEmpty and mapFailure)
• removed getUuid method from PolicyDefinition
• removed unused select methods from DataPlaneSelectorService
• cleaned up some e2e test methods

Why it does that

cleanup

Further notes

List other areas of code that have changed but are not necessarily linked to the main feature. This could be method
signature changes, package declarations, bugs that were encountered and were fixed inline, etc.

Linked Issue(s)

Closes # <-- insert Issue number if one exists

Please be sure to take a look at the contributing guidelines and our etiquette for pull requests.