[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/when/withSubjectVariable/shadowingOtherVariable.fir.kt

@@ -0,0 +1,27 @@
+// !LANGUAGE: +VariableDeclarationInWhenSubject
+// !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
+
+fun foo(): Any = 42
+fun useInt(i: Int) {}
+
+fun testShadowingParameter(y: Any) {
+    when (val y = foo()) {
+        else -> {}
+    }
+}
+
+fun testShadowedInWhenBody(x: Any) {
+    when (val y = x) {
+        is String -> {
+            val y = y.length
+            useInt(y)
+        }
+    }
+}
+
+fun testShadowinLocalVariable() {
+    val y = foo()
+    when (val y = foo()) {
+        else -> {}
+    }
+}