Test find usages behaviour when failing to text search on Groovy files

Set test directory to directory with test files (not relative to
findUsages folder). This way test will be configured as if all testdata
is under source root (previously it was copied into package under path
with findUsages) and resolvers will see classes under root package.

 #KT-14974 In Progress

idea/testData/findUsages/java/findJavaMethodUsages/JavaWithGroovyInvoke.log

@@ -0,0 +1,4 @@
+Searched references to JavaWithGroovyInvoke_0
+Used plain search of JavaWithGroovyInvoke_0.invoke() in LocalSearchScope:
+    JetFile: JavaWithGroovyInvoke.0.kt
+Used plain search of JavaWithGroovyInvoke_0.invoke() in whole search scope