Make RunnableSuite JVM-specific

[zainab-ali]

The RunnableSuite class is used to integrate with JUnit. It provides:

• A plan function, for creating a list of tests to run
• A runUnsafe function for running tests, only used in JUnit
• The RunWith annotation linking it to the WeaverRunner.

It is currently shared across all platforms, but is only required for the JVM.

This introduces some redundancies in the JS and Native implementations. As an example, unsafeRunSync is only needed in the JVM implementation, but needs to be implemented for JS and Native.

This PR moves RunnableSuite into the jvm sources. Suites that extend RunnableSuite (SharedResourceSuite and DisciplineFSuite) have corresponding Compat traits that either extend RunnableSuite or EffectSuite.

[zainab-ali]

This diff is hard to read, but the changes are as follows:

• The analyze function has been moved from RunnableSuite to SharedResourceSuite. This is private to weaver.
• The public isCI function has been moved to SharedResourceSuite. Users of DisciplineFSuite that are calling isCI(assuming there are any) will have to implement their own isCI function. Arguably, this shouldn't be part of the public API in the first place.
• The RunnableSuite has been moved into JVM sources. Users who refer to RunnableSuite in cross-platform builds should refer to EffectSuite instead.