Add raw type comparison for Java (J2K mapping is taken into account)

NB: Java enhancement scope does not perform substitution, so we could
have some duplicates inside "type enhancement" testData

Related to KT-29937

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassSymbol.kt

@@ -14,4 +14,14 @@ import org.jetbrains.kotlin.name.ClassId
 
 class FirClassSymbol(override val classId: ClassId) : ConeClassSymbol, AbstractFirBasedSymbol<FirRegularClass>() {
     override fun toLookupTag(): ConeClassLikeLookupTag = ConeClassLikeLookupTagImpl(classId)
+
+    override fun equals(other: Any?): Boolean =
+        other is FirClassSymbol && classId == other.classId && fir == other.fir
+
+    override fun hashCode(): Int {
+        var result = 31
+        result = result * 19 + classId.hashCode()
+        result = result * 19 + fir.hashCode()
+        return result
+    }
 }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirTypeAliasSymbol.kt

@@ -16,6 +16,16 @@ class FirTypeAliasSymbol(
     override val classId: ClassId
 ) : ConeTypeAliasSymbol, AbstractFirBasedSymbol<FirTypeAlias>() {
     override fun toLookupTag(): ConeClassLikeLookupTag = TypeAliasLookupTagImpl(classId)
+
+    override fun equals(other: Any?): Boolean =
+        other is FirTypeAliasSymbol && classId == other.classId && fir == other.fir
+
+    override fun hashCode(): Int {
+        var result = 31
+        result = result * 19 + classId.hashCode()
+        result = result * 19 + fir.hashCode()
+        return result
+    }
 }
 
 class TypeAliasLookupTagImpl(

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirTypeParameterSymbol.kt

@@ -19,4 +19,12 @@ class FirTypeParameterSymbol : AbstractFirBasedSymbol<FirTypeParameter>(), ConeT
         get() = this
 
     override fun toLookupTag(): ConeTypeParameterLookupTag = this
+
+    override fun equals(other: Any?): Boolean {
+        return other is FirTypeParameterSymbol && fir == other.fir
+    }
+
+    override fun hashCode(): Int {
+        return fir.hashCode()
+    }
 }