IC: add tests with moving files

Additionally added the ability to use directories in IC tests.

 #KT-8002 Obsolete

jps-plugin/testData/incremental/pureKotlin/moveFileWithChangingPackage/foo/a.kt

@@ -0,0 +1,5 @@
+package foo
+
+class Foo
+
+fun bar() {}

jps-plugin/testData/incremental/pureKotlin/moveFileWithChangingPackage/foo/dummy.kt

@@ -0,0 +1,3 @@
+package foo
+
+private fun dummy() {}