FIR CFG: remove ordering from control flow through in-place lambdas

Old graph:

  arg -> lambda enter -> ... -> lambda exit -> lambda enter -> ... ->
   -> lambda exit -> call

New graph:

  arg -+-> lambda enter -> ... -> lambda exit -+-> call
       \-> lambda enter -> ... -> lambda exit -/

compiler/fir/analysis-tests/testData/resolve/smartcasts/lambdas/lambdaInWhenBranch.dot

@@ -216,10 +216,11 @@ digraph lambdaInWhenBranch_kt {
     45 -> {46};
     46 -> {47};
     47 -> {48};
-    48 -> {82};
-    48 -> {49} [color=red];
+    48 -> {82 50};
+    48 -> {49} [style=dotted];
     48 -> {82} [style=dashed];
-    49 -> {50};
+    49 -> {53} [color=red];
+    49 -> {50} [color=green];
     50 -> {51};
     51 -> {52};
     52 -> {53};
@@ -255,7 +256,6 @@ digraph lambdaInWhenBranch_kt {
     83 -> {84};
     84 -> {85};
     85 -> {86};
-    86 -> {53} [color=red];
-    86 -> {49} [color=green];
+    86 -> {49};
 
 }