KT-9550: distinguish signature conflict on override from signature conflict of inherited members.

Add a common OverridingStrategy class for cases where we don't care (yet) about precise diagnostics.

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/components/DescriptorResolverUtils.java

@@ -27,11 +27,14 @@ import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor;
 import org.jetbrains.kotlin.load.java.structure.*;
 import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.name.Name;
-import org.jetbrains.kotlin.resolve.OverridingStrategy;
+import org.jetbrains.kotlin.resolve.NonReportingOverrideStrategy;
 import org.jetbrains.kotlin.resolve.OverridingUtil;
 import org.jetbrains.kotlin.serialization.deserialization.ErrorReporter;
 
-import java.util.*;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
 
 public final class DescriptorResolverUtils {
     private DescriptorResolverUtils() {
@@ -66,7 +69,7 @@ public final class DescriptorResolverUtils {
 
         OverridingUtil.generateOverridesInFunctionGroup(
                 name, membersFromSupertypes, membersFromCurrent, classDescriptor,
-                new OverridingStrategy() {
+                new NonReportingOverrideStrategy() {
                     @Override
                     @SuppressWarnings("unchecked")
                     public void addFakeOverride(@NotNull CallableMemberDescriptor fakeOverride) {