[FE 1.0] Don't report deprecation diagnostics about enum on it's own entries

^KT-37975 Fixed

compiler/testData/diagnostics/tests/deprecated/usageOnEnum.kt

@@ -0,0 +1,8 @@
+// FIR_IDENTICAL
+// LANGUAGE: +NoDeprecationOnDeprecatedEnumEntries
+// ISSUE: KT-37975
+
+@Deprecated("")
+enum class Foo(val x: Int) {
+    A(42)
+}

compiler/testData/diagnostics/tests/deprecated/usageOnEnum.txt

@@ -0,0 +1,21 @@
+package
+
+@kotlin.Deprecated(message = "") public final enum class Foo : kotlin.Enum<Foo> {
+    enum entry A
+
+    private constructor Foo(/*0*/ x: kotlin.Int)
+    public final override /*1*/ /*fake_override*/ val name: kotlin.String
+    public final override /*1*/ /*fake_override*/ val ordinal: kotlin.Int
+    public final val x: kotlin.Int
+    protected final override /*1*/ /*fake_override*/ fun clone(): kotlin.Any
+    public final override /*1*/ /*fake_override*/ fun compareTo(/*0*/ other: Foo): 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<Foo!>!
+    public final override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    // Static members
+    public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): Foo
+    public final /*synthesized*/ fun values(): kotlin.Array<Foo>
+}