Add tests for enhanced java signatures based on AbstractResolvedCallsTest.

Refactor AbstractResolvedCallsTest to support multiple carets (multiple methods being tested  for resolve) in testdata file.

compiler/testData/resolvedCalls/enhancedSignatures/map/mapForEach.kt

@@ -0,0 +1,7 @@
+fun valuesNotNull(map: MutableMap<Int, String>) {
+    map.<caret>forEach { k, v -> }
+}
+
+fun <T> valuesT(map: MutableMap<Int, T>, newValue: T) {
+    map.<caret>forEach { k, v -> }
+}