Report JVM signature clashes from JVM_IR

Also:

* Do not rename public ABI fields
This includes backing fields for const, lateinit, @JvmField properties,
and instance fields for objects.

* FAKE_OVERRIDE declarations for static members of parent Java classes
Required to report cases when a Kotlin function accidentally overrides
Java class member.

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/synthesized/enumValuesValueOf.kt

@@ -0,0 +1,12 @@
+enum class <!CONFLICTING_JVM_DECLARATIONS, CONFLICTING_JVM_DECLARATIONS!>A<!> {
+    A1,
+    A2;
+
+    <!CONFLICTING_JVM_DECLARATIONS!>fun valueOf(s: String): A<!> = valueOf(s)
+
+    fun valueOf() = "OK"
+
+    <!CONFLICTING_JVM_DECLARATIONS!>fun values(): Array<A><!> = null!!
+
+    fun values(x: String) = x
+}

compiler/testData/diagnostics/testsWithJvmBackend/duplicateJvmSignature/synthesized/enumValuesValueOf.txt

@@ -0,0 +1,26 @@
+package
+
+public final enum class A : kotlin.Enum<A> {
+    enum entry A1
+
+    enum entry A2
+
+    private constructor A()
+    public final override /*1*/ /*fake_override*/ val name: kotlin.String
+    public final override /*1*/ /*fake_override*/ val ordinal: kotlin.Int
+    protected final override /*1*/ /*fake_override*/ fun clone(): kotlin.Any
+    public final override /*1*/ /*fake_override*/ fun compareTo(/*0*/ other: A): kotlin.Int
+    public final override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected/*protected and package*/ final override /*1*/ /*fake_override*/ /*isHiddenForResolutionEverywhereBesideSupercalls*/ fun finalize(): kotlin.Unit
+    public final override /*1*/ /*fake_override*/ /*isHiddenForResolutionEverywhereBesideSupercalls*/ fun getDeclaringClass(): java.lang.Class<A!>!
+    public final override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final fun valueOf(): kotlin.String
+    public final fun valueOf(/*0*/ s: kotlin.String): A
+    public final fun values(): kotlin.Array<A>
+    public final fun values(/*0*/ x: kotlin.String): kotlin.String
+
+    // Static members
+    public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): A
+    public final /*synthesized*/ fun values(): kotlin.Array<A>
+}