[FIR] Replace single supertype scope with list of scopes of supertypes in use site scopes

This big refactoring is needed to cleanup building of overrides
  mappings and prevent creating redundant intersection overrides in
  cases when there is no need in them:

```kotlin
interface A {
    fun foo()
}

interface B {
    fun foo()
}

interface C : A, B {
    override fun foo()
}
```

Before this refactoring there was next override tree:
C.foo
  intersection override (A.foo, B.foo)
    A.foo
    B.foo

Also this commit fixes special mapping of overrides in jvm scopes
  for declarations which have kotlin builtins in supertypes with
  special java mapping rules (collections, for example)

compiler/fir/analysis-tests/testData/resolve/scopes/explicitOverrideOfTwoMembers_java.kt

@@ -0,0 +1,42 @@
+// SCOPE_DUMP: C:foo;x;y;getX, D:x;y;getX, E:x;getX
+
+// FILE: lib.kt
+interface A {
+    fun foo(): Any
+    val x: Int
+    val y: Int
+}
+
+interface B {
+    fun foo(): Any
+    val x: String
+    val y: Int
+}
+
+// FILE: C.java
+public abstract class C {
+    public int x;
+    private int y;
+}
+
+// FILE: D.java
+public abstract class D extends C implements A, B {
+    public abstract Object foo();
+
+    public abstract Object getX();
+    public abstract int getY();
+}
+
+// FILE: E.java
+public abstract class E implements A, B {
+    public abstract Object foo();
+
+    public abstract Object getX();
+}
+
+// FILE: main.kt
+
+fun test(d: D) {
+    val a = d.x
+    val b = d.y
+}