Consider all real functions, not only declarations in bridge codegen

There should be bridges to all of the functions present in bytecode

compiler/testData/codegen/box/bridges/fakeOverrideWithSynthesizedImplementation.kt

@@ -0,0 +1,14 @@
+open data class A(val value: String)
+
+trait B {
+    fun component1(): Any
+}
+
+class C(value: String) : A(value), B
+
+fun box(): String {
+    val c = C("OK")
+    if ((c : B).component1() != "OK") return "Fail 1"
+    if ((c : A).component1() != "OK") return "Fail 2"
+    return c.component1()
+}