Class templates should be able to declare `@ResourceLock`

[marcphilipp]

Steps to reproduce

1. Annotate a @ClassTemplate class with @ResourceLock("key")
2. See it fail with "Dynamic test descriptors must not declare exclusive resources"

Context

• Used versions (Jupiter/Vintage/Platform): 5.14.1 / 6.0.1
• Build Tool/IDE: irrelevant

Deliverables

• Allow @ResourceLock on @ClassTemplate classes