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

compiler/testData/diagnostics/tests/targetedBuiltIns/concurrentMapRemove.fir.kt

@@ -0,0 +1,22 @@
+// !WITH_NEW_INFERENCE
+// FULL_JDK
+
+import java.util.concurrent.*
+
+val concurrent: ConcurrentMap<String, Int> = null!!
+val concurrentHash: ConcurrentHashMap<String, Int> = null!!
+
+fun foo() {
+    concurrent.remove("", 1)
+    concurrent.remove("", "")
+    concurrentHash.remove("", 1)
+    concurrentHash.remove("", "")
+
+    // Flexible types
+    concurrent.remove(null, 1)
+    concurrent.remove(null, null)
+
+    // @PurelyImplements
+    concurrentHash.remove(null, 1)
+    concurrentHash.remove(null, null)
+}