[FIR] CFG: drop redundant edges

Edges from class to its functions and nested classes are redundant
and lead to extra resolution work in lazy resolve mode

^KT-59600 Fixed

compiler/fir/analysis-tests/testData/resolveWithStdlib/initialization/fromLocalMembers.kt

@@ -12,6 +12,7 @@ fun test1() {
 fun test2() {
     val x: Int
     val y: Int
+    val z: Int
 
     object {
         init {
@@ -21,6 +22,12 @@ fun test2() {
         fun localFunc() {
             <!CAPTURED_VAL_INITIALIZATION!>y<!> = 0
         }
+
+        val prop: Int
+            get() {
+                <!CAPTURED_VAL_INITIALIZATION!>z<!> = 0
+                return 2
+            }
     }
 
     println(x)