[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolveWithStdlib/noneWithForEach.kt

@@ -0,0 +1,19 @@
+interface Diagnostic {
+    val name: String
+}
+
+fun foo(conflicting: List<Diagnostic>) {
+    val filtered = arrayListOf<Diagnostic>()
+    conflicting.groupBy {
+        it.name
+    }.forEach {
+        val diagnostics = it.value
+        filtered.addAll(
+            diagnostics.filter { me ->
+                diagnostics.none { other ->
+                    me != other
+                }
+            }
+        )
+    }
+}