JetDiagnosticsTest migrated to TestGenerator

- test data files renamed from *.jet to *.kt

compiler/testData/diagnostics/tests/controlStructures/kt1075.kt

@@ -0,0 +1,11 @@
+package kt1075
+
+//KT-1075 No type check for 'in range' condition in 'when' expression
+
+fun foo(b: String) {
+    if (<!TYPE_MISMATCH!>b<!> in 1..10) {} //type mismatch
+    when (b) {
+        <!TYPE_MISMATCH_IN_RANGE!>in<!> 1..10 -> 1 //no type mismatch, but it should be here
+        else -> 2
+    }
+}