TrailingCommaVisitor: adapt to TrailingCommaContext

#KT-39123 Fixed

idea/testData/formatter/When.after.inv.kt

@@ -1,7 +1,7 @@
 fun some(x: Any) {
     when (x) {
         is Number -> 0
-        else -> 1
+        else      -> 1
     }
     when {
     }
@@ -37,4 +37,11 @@ fun some(x: Any) {
     }
 }
 
+val a = when {
+    true && true && true -> {
+    }
+    else                 -> {
+    }
+}
+
 // SET_FALSE: ALIGN_IN_COLUMNS_CASE_BRANCH

idea/testData/formatter/When.after.kt

@@ -37,4 +37,11 @@ fun some(x: Any) {
     }
 }
 
+val a = when {
+    true && true && true -> {
+    }
+    else -> {
+    }
+}
+
 // SET_FALSE: ALIGN_IN_COLUMNS_CASE_BRANCH

idea/testData/formatter/When.kt

@@ -43,4 +43,11 @@ else->1
     when {}
 }
 
+val a = when {
+    true && true && true -> {
+    }
+    else -> {
+    }
+}
+
 // SET_FALSE: ALIGN_IN_COLUMNS_CASE_BRANCH