FIR CFG: correct edge label from a node that returns Nothing

If it's not within a try/catch/finally, that should be an uncaught
exception path.

^KT-45327 Fixed

compiler/fir/analysis-tests/testData/resolve/cfg/initBlock.dot

@@ -84,7 +84,7 @@ digraph initBlock_kt {
     20 -> {21};
     21 -> {22};
     22 -> {23};
-    23 -> {28};
+    23 -> {28}    [label=onUncaughtException];
     23 -> {24} [style=dotted];
     24 -> {25} [style=dotted];
     25 -> {26} [style=dotted];

compiler/fir/analysis-tests/testData/resolve/cfg/jumps.dot

@@ -72,7 +72,7 @@ digraph jumps_kt {
     15 -> {16};
     16 -> {17};
     17 -> {18};
-    18 -> {29};
+    18 -> {29}    [label=onUncaughtException];
     18 -> {19} [style=dotted];
     19 -> {20} [style=dotted];
     20 -> {21} [style=dotted];

compiler/fir/analysis-tests/testData/resolve/cfg/lambdaReturningObject.dot

@@ -63,7 +63,7 @@ digraph lambdaReturningObject_kt {
     }
     13 -> {14};
     14 -> {15};
-    15 -> {20};
+    15 -> {20}    [label=onUncaughtException];
     15 -> {16} [style=dotted];
     16 -> {17} [style=dotted];
     17 -> {20 18} [style=dotted];

compiler/fir/analysis-tests/testData/resolve/cfg/propertiesAndInitBlocks.dot

@@ -107,7 +107,7 @@ digraph propertiesAndInitBlocks_kt {
     41 -> {42};
     42 -> {43};
     43 -> {44};
-    44 -> {47};
+    44 -> {47}    [label=onUncaughtException];
     44 -> {45} [style=dotted];
     45 -> {46} [style=dotted];
     46 -> {47} [style=dotted];
@@ -138,7 +138,7 @@ digraph propertiesAndInitBlocks_kt {
     51 -> {52};
     52 -> {53};
     53 -> {54};
-    54 -> {58};
+    54 -> {58}    [label=onUncaughtException];
     54 -> {55} [style=dotted];
     55 -> {56} [style=dotted];
     56 -> {57} [style=dotted];
@@ -199,7 +199,7 @@ digraph propertiesAndInitBlocks_kt {
     70 -> {71};
     71 -> {72};
     72 -> {73};
-    73 -> {76};
+    73 -> {76}    [label=onUncaughtException];
     73 -> {74} [style=dotted];
     74 -> {75} [style=dotted];
     75 -> {76} [style=dotted];
@@ -246,7 +246,7 @@ digraph propertiesAndInitBlocks_kt {
     28 -> {48 34} [color=green];
     28 -> {48 34} [style=dashed];
     29 -> {30};
-    30 -> {81};
+    30 -> {81}    [label=onUncaughtException];
     30 -> {31} [style=dotted];
     31 -> {32} [style=dotted];
     32 -> {33} [style=dotted];

compiler/fir/analysis-tests/testData/resolve/cfg/returnValuesFromLambda.dot

@@ -204,7 +204,8 @@ digraph returnValuesFromLambda_kt {
     57 -> {65} [style=dashed];
     58 -> {60} [style=dotted];
     59 -> {60} [style=dotted];
-    60 -> {64 61} [style=dotted];
+    60 -> {61} [style=dotted];
+    60 -> {64} [style=dotted]    [label=onUncaughtException];
     61 -> {62} [style=dotted];
     62 -> {63} [style=dotted];
     63 -> {64} [style=dotted];