Adjust descriptor renderer to latest parsing changes

- `constructor` keyword expected in primary constructor with non-empty modifier list
- annotation list should be preceeded by '@'

idea/testData/decompiler/decompiledText/AnnotationsOnPrimaryCtr.expected.kt

@@ -3,6 +3,6 @@
 
 package test
 
-internal final class AnnotationsOnPrimaryCtr [dependency.A dependency.B dependency.C] private () {
+internal final class AnnotationsOnPrimaryCtr @[dependency.A dependency.B dependency.C] private constructor() {
 }