Do not load special builtin overrides from Java as synthesized

It has been done just to avoid clashes with real declarations that look
like our builtins: e.g. 'String removeAt(int index) {}' and 'String remove(int index) {}'in Java.

But synthesized members are even weaker than extensions.

Solution is just to ignore the latter declaration and treat first as effective override
of out builltin.

compiler/testData/diagnostics/testsWithStdLib/commonCollections.kt

@@ -0,0 +1,28 @@
+import java.util.*
+fun foo() {
+    val al = ArrayList<String>()
+    al.size
+    al.contains(1)
+    al.contains("")
+
+    al.remove("")
+    al.removeAt(1)
+
+    val hs = HashSet<String>()
+    hs.size
+    hs.contains(1)
+    hs.contains("")
+
+    hs.remove("")
+
+
+    val hm = HashMap<String, Int>()
+    hm.size
+    hm.<!DEPRECATION!>containsKey<!>(1)
+    hm.containsKey("")
+
+    <!DEPRECATION!>hm[1]<!>
+    hm[""]
+
+    hm.remove("")
+}

compiler/testData/diagnostics/testsWithStdLib/commonCollections.txt

@@ -0,0 +1,3 @@
+package
+
+public fun foo(): kotlin.Unit