Similarly to K2JVMCompilerArguments, they will soon be needed in the IDE code.
Move COMPILER_JAR_LOCATOR to CLIConfigurationKeys because it's used both in JVM
and JS, and only in CLI. Other keys, non-relevant in the IDE, may be moved out
soon as well, such as incremental compilation components
The main reasoning for the module is to avoid running any compiler tests while executing run configuration that searches tests across module dependencies.