Use Scala Native test-interface-sbt-defs instead of test-interface

[zainab-ali]

See scala-native/scala-native#4844

Testing libraries and frameworks should depend on Scala Native's test-interface-sbt-defs, not test-interface.

• test-interface-sbt-defs defines a common interface for unit tests. It follows early-semver versioning.
• test-interface is a server implementation that must match the version of the Scala Native plugin. It follows strict versioning.

This was picked up by SBT 1.12.10, which added eviction checks for test dependencies.

How to reproduce

You can reproduce the problem in the weaver-test repo. Set evictionWarningOptions to cover the Test configuration:

ThisBuild / evictionWarningOptions := (ThisBuild / evictionWarningOptions).value
  .withConfigurations(List(Compile, Test))

and run sbt "scalacheckNative / update".

[satorg]

Thank you!