Fix FQ name usage of experimental marker in UseExperimental

#KT-26366 Fixed

compiler/testData/diagnostics/testsWithStdLib/experimental/fullFqNameUsage.kt

@@ -0,0 +1,12 @@
+// !USE_EXPERIMENTAL: kotlin.Experimental
+
+package test.abc
+
+@Experimental
+annotation class E
+
+@UseExperimental(test.abc.E::class)
+fun f() {}
+
+@test.abc.E
+fun g() {}

compiler/testData/diagnostics/testsWithStdLib/experimental/fullFqNameUsage.txt

@@ -0,0 +1,16 @@
+package
+
+package test {
+
+    package test.abc {
+        @kotlin.UseExperimental(markerClass = {test.abc.E::class}) public fun f(): kotlin.Unit
+        @test.abc.E public fun g(): kotlin.Unit
+
+        @kotlin.Experimental public final annotation class E : kotlin.Annotation {
+            public constructor E()
+            public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+            public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+            public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        }
+    }
+}