[FIR] Add CFG nodes, add multiple subGraphs for CFGOwner

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

@@ -37,6 +37,7 @@ digraph callsInPlace_kt {
     2 -> {3};
     3 -> {11};
     3 -> {5} [color=red];
+    3 -> {11} [style=dashed];
     4 -> {6} [color=red];
     5 -> {6} [color=green];
     6 -> {7};
@@ -81,6 +82,7 @@ digraph callsInPlace_kt {
     19 -> {20};
     20 -> {25};
     20 -> {21} [color=red];
+    20 -> {25} [style=dashed];
     21 -> {22};
     22 -> {23};
     23 -> {24};
@@ -120,6 +122,7 @@ digraph callsInPlace_kt {
     31 -> {32};
     32 -> {38};
     32 -> {33} [color=red];
+    32 -> {38} [style=dashed];
     33 -> {34};
     34 -> {35};
     35 -> {36};
@@ -166,6 +169,7 @@ digraph callsInPlace_kt {
     45 -> {46};
     46 -> {52};
     46 -> {48} [color=red];
+    46 -> {52} [style=dashed];
     47 -> {49} [color=red];
     48 -> {49} [color=green];
     49 -> {50};
@@ -216,6 +220,7 @@ digraph callsInPlace_kt {
     63 -> {64};
     64 -> {70};
     64 -> {66} [color=red];
+    64 -> {70} [style=dashed];
     65 -> {67} [color=red];
     66 -> {67} [color=green];
     67 -> {68};
@@ -290,9 +295,11 @@ digraph callsInPlace_kt {
     86 -> {87};
     87 -> {94};
     87 -> {88} [color=red];
+    87 -> {94} [style=dashed];
     88 -> {89};
     89 -> {99};
     89 -> {90} [color=red];
+    89 -> {99} [style=dashed];
     90 -> {91};
     91 -> {92};
     92 -> {93};
@@ -350,9 +357,11 @@ digraph callsInPlace_kt {
     105 -> {106};
     106 -> {113};
     106 -> {107} [color=red];
+    106 -> {113} [style=dashed];
     107 -> {108};
     108 -> {118};
     108 -> {109} [color=red];
+    108 -> {118} [style=dashed];
     109 -> {110};
     110 -> {111};
     111 -> {112};
@@ -412,6 +421,7 @@ digraph callsInPlace_kt {
     128 -> {129};
     129 -> {130};
     130 -> {131 135};
+    130 -> {135} [style=dashed];
     131 -> {132};
     132 -> {133};
     133 -> {134};

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/callsInPlace/atLeastOnce.dot

@@ -68,6 +68,7 @@ digraph atLeastOnce_kt {
     12 -> {13};
     13 -> {20};
     13 -> {14} [color=red];
+    13 -> {20} [style=dashed];
     14 -> {15};
     15 -> {16};
     16 -> {17};
@@ -114,6 +115,7 @@ digraph atLeastOnce_kt {
     28 -> {29};
     29 -> {36};
     29 -> {30} [color=red];
+    29 -> {36} [style=dashed];
     30 -> {31};
     31 -> {32};
     32 -> {33};

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/callsInPlace/atMostOnce.dot

@@ -68,6 +68,7 @@ digraph atMostOnce_kt {
     12 -> {13};
     13 -> {20};
     13 -> {14} [color=red];
+    13 -> {20} [style=dashed];
     14 -> {15};
     15 -> {16};
     16 -> {17};
@@ -113,6 +114,7 @@ digraph atMostOnce_kt {
     28 -> {29};
     29 -> {36};
     29 -> {30} [color=red];
+    29 -> {36} [style=dashed];
     30 -> {31};
     31 -> {32};
     32 -> {33};

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/callsInPlace/exactlyOnce.dot

@@ -69,6 +69,7 @@ digraph exactlyOnce_kt {
     12 -> {13};
     13 -> {21};
     13 -> {15} [color=red];
+    13 -> {21} [style=dashed];
     14 -> {16} [color=red];
     15 -> {16} [color=green];
     16 -> {17};
@@ -117,6 +118,7 @@ digraph exactlyOnce_kt {
     29 -> {30};
     30 -> {38};
     30 -> {32} [color=red];
+    30 -> {38} [style=dashed];
     31 -> {33} [color=red];
     32 -> {33} [color=green];
     33 -> {34};

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/callsInPlace/unknown.dot

@@ -68,6 +68,7 @@ digraph unknown_kt {
     12 -> {13};
     13 -> {20};
     13 -> {14} [color=red];
+    13 -> {20} [style=dashed];
     14 -> {15};
     15 -> {16};
     16 -> {17};
@@ -114,6 +115,7 @@ digraph unknown_kt {
     28 -> {29};
     29 -> {36};
     29 -> {30} [color=red];
+    29 -> {36} [style=dashed];
     30 -> {31};
     31 -> {32};
     32 -> {33};