[LC] Fixed light classes nullability for Kotlin 1.5

Fixed #KT-44472

compiler/testData/asJava/lightClasses/nullabilityAnnotations/Class.java

@@ -2,6 +2,9 @@ public final class Class /* Class*/ {
   @org.jetbrains.annotations.NotNull()
   private final java.lang.String notNullVal;
 
+  @org.jetbrains.annotations.NotNull()
+  private final java.lang.String privateNN;
+
   @org.jetbrains.annotations.NotNull()
   private java.lang.String notNullVar;
 
@@ -9,11 +12,10 @@ public final class Class /* Class*/ {
   private final java.lang.String nullableVal;
 
   @org.jetbrains.annotations.Nullable()
-  private java.lang.String nullableVar;
-
   private final java.lang.String privateN;
 
-  private final java.lang.String privateNN;
+  @org.jetbrains.annotations.Nullable()
+  private java.lang.String nullableVar;
 
   public java.lang.String lateInitVar;
 

compiler/testData/asJava/lightClasses/nullabilityAnnotations/ClassObjectField.java

@@ -5,6 +5,7 @@ public final class ClassObjectField /* ClassObjectField*/ {
   @org.jetbrains.annotations.Nullable()
   private static final java.lang.String x;
 
+  @org.jetbrains.annotations.Nullable()
   private static final java.lang.String y;
 
   public  ClassObjectField();//  .ctor()

compiler/testData/asJava/lightClasses/nullabilityAnnotations/ClassWithConstructorAndProperties.kt

@@ -4,3 +4,5 @@ class ClassWithConstructorAndProperties(
         val nullable: String?,
         val notNull: String
 )
+
+// FIR_COMPARISON

compiler/testData/asJava/lightClasses/nullabilityAnnotations/FileFacade.java

@@ -2,6 +2,9 @@ public final class FileFacadeKt /* FileFacadeKt*/ {
   @org.jetbrains.annotations.NotNull()
   private static final java.lang.String notNullVal;
 
+  @org.jetbrains.annotations.NotNull()
+  private static final java.lang.String privateNn;
+
   @org.jetbrains.annotations.NotNull()
   private static java.lang.String notNullVar;
 
@@ -9,11 +12,10 @@ public final class FileFacadeKt /* FileFacadeKt*/ {
   private static final java.lang.String nullableVal;
 
   @org.jetbrains.annotations.Nullable()
-  private static java.lang.String nullableVar;
-
   private static final java.lang.String privateN;
 
-  private static final java.lang.String privateNn;
+  @org.jetbrains.annotations.Nullable()
+  private static java.lang.String nullableVar;
 
   @org.jetbrains.annotations.NotNull()
   @org.jetbrains.annotations.Nullable()

compiler/testData/asJava/lightClasses/nullabilityAnnotations/FileFacade.kt

@@ -33,4 +33,6 @@ var nullableVarWithGetSet: String?
 
 private val privateNn: String = { "" }()
 private val privateN: String? = { "" }()
-private fun privateFun(a: String, b: String?): String? = null
+private fun privateFun(a: String, b: String?): String? = null
+
+// FIR_COMPARISON