Fixes #6785.

…acoption

Remove scalacoption -S-X

…ssDefFoundError

Problem
-------
In some situations like Dotty Community Build, sbt version is
mechanically upgraded on an old commit without humans checking the log.
For reasons we're not completely sure (likely change in ClassLoader
structure) sbt 1.6.x started to fail to load test frameworks during
tests, but since the failure of the test framework loading doesn't fail
the task, this silently succeeded the builds.

Solution
--------
On MatchError and NoClassDefFound Error, rethrow the exception.
Note that ClassNotFoundException is considered ok since we have
predefined test frameworks listed in sbt, which often are not included
in the users' classpath.

[1.6.x] Throw when test framework cannot be loaded due to MatchError or NoClassDefFoundError

Motivation:
Cannot exit from InteractionService.readLine

Modification:
Remove try/catch of InterruptedException mapped to None in JLine.readLine

Fixes #1937
Ref sbt/librarymanagement#395

[1.6.x] fix: propagate `InterruptedException` from JLine.readLine

[1.6.x] Make License object available