FIR CFG: merge DFA + CFA edge in Simple edge

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromLibrary/callsInPlace.dot

@@ -274,7 +274,7 @@ digraph callsInPlace_kt {
         93 [label="Exit function test_8" style="filled" fillcolor=red];
     }
     92 -> {94};
-    94 -> {95} [color=green];
+    94 -> {95};
     94 -> {97} [color=red];
     95 -> {96};
     96 -> {93};

compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/delegateWithAnonymousObject.dot

@@ -163,14 +163,14 @@ digraph delegateWithAnonymousObject_kt {
     66 -> {54} [color=green];
     54 -> {56};
     55 -> {67} [color=green];
-    56 -> {57} [color=green];
+    56 -> {57};
     57 -> {58};
     58 -> {59};
     59 -> {60};
     60 -> {61};
     61 -> {62};
     62 -> {63};
-    63 -> {64} [color=green];
+    63 -> {64};
     63 -> {21} [color=red];
     64 -> {65};
     65 -> {55};

compiler/fir/analysis-tests/testData/resolveWithStdlib/smartcasts/tryWithLambdaInside.dot

@@ -155,7 +155,7 @@ finally {
     33 -> {41};
     34 -> {35};
     35 -> {36};
-    36 -> {37} [color=green];
+    36 -> {37};
     36 -> {46} [color=red];
     37 -> {38};
     38 -> {39};