[FIR] Add proper nullability for java enums

compiler/testData/loadJava/compiledJava/annotations/AnnotatedEnumEntry.fir.txt

@@ -1,9 +1,9 @@
 public final enum class AnnotatedEnumEntry : R|kotlin/Enum<ft<test/AnnotatedEnumEntry, test/AnnotatedEnumEntry?>!>| {
-    @R|test/AnnotatedEnumEntry.Anno|(String(a)) public final static field E1: R|ft<test/AnnotatedEnumEntry, test/AnnotatedEnumEntry?>!|
+    @R|test/AnnotatedEnumEntry.Anno|(String(a)) public final static field E1: R|test/AnnotatedEnumEntry|
 
-    @R|test/AnnotatedEnumEntry.Anno|(String(b)) @R|test/AnnotatedEnumEntry.Anno2|() public final static field E2: R|ft<test/AnnotatedEnumEntry, test/AnnotatedEnumEntry?>!|
+    @R|test/AnnotatedEnumEntry.Anno|(String(b)) @R|test/AnnotatedEnumEntry.Anno2|() public final static field E2: R|test/AnnotatedEnumEntry|
 
-    public final static field E3: R|ft<test/AnnotatedEnumEntry, test/AnnotatedEnumEntry?>!|
+    public final static field E3: R|test/AnnotatedEnumEntry|
 
     public final static fun values(): R|kotlin/Array<test/AnnotatedEnumEntry>| {
     }

compiler/testData/loadJava/compiledJava/annotations/EnumConstructorParameter.fir.txt

@@ -1,5 +1,5 @@
 public final enum class EnumConstructorParameter : R|kotlin/Enum<ft<test/EnumConstructorParameter, test/EnumConstructorParameter?>!>| {
-    public final static field INSTANCE: R|ft<test/EnumConstructorParameter, test/EnumConstructorParameter?>!|
+    public final static field INSTANCE: R|test/EnumConstructorParameter|
 
     private constructor(@R|test/EnumConstructorParameter.Anno|(String(string)) s: R|ft<kotlin/String, kotlin/String?>!|): R|test/EnumConstructorParameter|
 

compiler/testData/loadJava/compiledJava/enum/EnumMembers.fir.txt

@@ -1,7 +1,7 @@
 public final enum class EnumMembers : R|kotlin/Enum<ft<test/EnumMembers, test/EnumMembers?>!>| {
-    public final static field FIRST: R|ft<test/EnumMembers, test/EnumMembers?>!|
+    public final static field FIRST: R|test/EnumMembers|
 
-    public final static field SECOND: R|ft<test/EnumMembers, test/EnumMembers?>!|
+    public final static field SECOND: R|test/EnumMembers|
 
     public final field isFirst: R|kotlin/Boolean|
 

compiler/testData/loadJava/compiledJava/enum/EnumWithSpecializedEntry.fir.txt

@@ -1,7 +1,7 @@
 public open enum class EnumWithSpecializedEntry : R|kotlin/Enum<ft<test/EnumWithSpecializedEntry, test/EnumWithSpecializedEntry?>!>| {
-    public final static field E1: R|ft<test/EnumWithSpecializedEntry, test/EnumWithSpecializedEntry?>!|
+    public final static field E1: R|test/EnumWithSpecializedEntry|
 
-    public final static field E2: R|ft<test/EnumWithSpecializedEntry, test/EnumWithSpecializedEntry?>!|
+    public final static field E2: R|test/EnumWithSpecializedEntry|
 
     public final static fun values(): R|kotlin/Array<test/EnumWithSpecializedEntry>| {
     }

compiler/testData/loadJava/compiledJava/enum/JavaEnum.fir.txt

@@ -1,7 +1,7 @@
 public final enum class JavaEnum : R|kotlin/Enum<ft<test/JavaEnum, test/JavaEnum?>!>| {
-    public final static field ENTRY: R|ft<test/JavaEnum, test/JavaEnum?>!|
+    public final static field ENTRY: R|test/JavaEnum|
 
-    public final static field ANOTHER: R|ft<test/JavaEnum, test/JavaEnum?>!|
+    public final static field ANOTHER: R|test/JavaEnum|
 
     public final static fun values(): R|kotlin/Array<test/JavaEnum>| {
     }

compiler/testData/loadJava/compiledJava/static/Enum.fir.txt

@@ -1,9 +1,9 @@
 public final enum class Enum : R|kotlin/Enum<ft<test/Enum, test/Enum?>!>| {
-    public final static field A: R|ft<test/Enum, test/Enum?>!|
+    public final static field A: R|test/Enum|
 
-    public final static field B: R|ft<test/Enum, test/Enum?>!|
+    public final static field B: R|test/Enum|
 
-    public final static field C: R|ft<test/Enum, test/Enum?>!|
+    public final static field C: R|test/Enum|
 
     public final static fun values(): R|kotlin/Array<test/Enum>| {
     }

compiler/testData/loadJava/compiledJava/static/StaticMembersInEnum.fir.txt

@@ -1,5 +1,5 @@
 public final enum class StaticMembersInEnum : R|kotlin/Enum<ft<test/StaticMembersInEnum, test/StaticMembersInEnum?>!>| {
-    public final static field ENTRY: R|ft<test/StaticMembersInEnum, test/StaticMembersInEnum?>!|
+    public final static field ENTRY: R|test/StaticMembersInEnum|
 
     public open static field STATIC_FIELD: R|kotlin/Int|