Moved tests for imports into proper group

compiler/testData/diagnostics/tests/imports/ImportObjectHidesCurrentPackage.kt

@@ -0,0 +1,12 @@
+//FILE:a.kt
+package a
+
+// no error is reported
+import b.a
+
+fun foo() = a
+
+//FILE:b.kt
+package b
+
+object a {}