Analysis API: move testdata to corresponding components folders

analysis/analysis-api/testData/components/expressionInfoProvider/whenMissingCases/enum_empty.kt

@@ -0,0 +1,8 @@
+enum class MyEnum {
+    A, B, C
+}
+
+fun test(e: MyEnum) {
+    <caret>when (e) {
+    }
+}