FIR: use frontend-independent Java type qualifier computation

compiler/testData/diagnostics/foreignAnnotationsTests/java8Tests/jspecify/warnMode/NullnessUnspecifiedTypeParameter.fir.kt

@@ -14,17 +14,17 @@ public class Test {}
 
 // FILE: main.kt
 fun main(a1: NullnessUnspecifiedTypeParameter<Any>, a2: NullnessUnspecifiedTypeParameter<Any?>, x: Test): Unit {
-    a1.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>)
+    a1.foo(null)
     a1.foo(1)
 
-    a2.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>)
+    a2.foo(null)
     a2.foo(1)
 
-    a1.bar(<!NULL_FOR_NONNULL_TYPE!>null<!>, <!NULL_FOR_NONNULL_TYPE!>null<!>)
-    a1.bar(x, <!NULL_FOR_NONNULL_TYPE!>null<!>)
+    a1.bar(<!NULL_FOR_NONNULL_TYPE!>null<!>, null)
+    a1.bar(x, null)
     a1.bar(x, 1)
 
-    a2.bar(<!NULL_FOR_NONNULL_TYPE!>null<!>, <!NULL_FOR_NONNULL_TYPE!>null<!>)
-    a2.bar(x, <!NULL_FOR_NONNULL_TYPE!>null<!>)
+    a2.bar(<!NULL_FOR_NONNULL_TYPE!>null<!>, null)
+    a2.bar(x, null)
     a2.bar(x, 1)
 }

compiler/testData/diagnostics/foreignAnnotationsTests/java8Tests/jspecify/warnMode/SelfType.fir.kt

@@ -40,12 +40,12 @@ public class CKN extends C<@Nullable CK> {}
 // FILE: main.kt
 fun main(ak: AK, akn: AKN, bk: BK, ck: CK, ckn: CKN): Unit {
     ak.foo(ak)
-    ak.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>)
+    ak.foo(null)
 
-    akn.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>) // the corresponding warning/error is present on the Java side
+    akn.foo(null) // the corresponding warning/error is present on the Java side
 
     bk.foo(bk)
-    bk.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>)
+    bk.foo(null)
 
     ck.foo(ck)
     ck.foo(null)

compiler/testData/diagnostics/foreignAnnotationsTests/java8Tests/jspecify/warnMode/TypeParameterBounds.fir.kt

@@ -29,11 +29,11 @@ fun <T : Test> main(a1: A<Any?>, a2: A<Test>, b1: B<Any?>, b2: B<Test>, x: T): U
     a2.bar<T?>(null)
     a2.bar<T>(x)
 
-    b1.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>)
+    b1.foo(null)
     b1.bar<T?>(null)
     b1.bar<T>(x)
 
-    b2.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>)
+    b2.foo(null)
     b2.bar<T?>(null)
     b2.bar<T>(x)
 }