[FIR] KT-53435: Fix false positive ANNOTATION_ARGUMENT_MUST_BE_CONST

Otherwise, `FirNamedArgumentExpression` are not considered
const expr despite the value.

Merge-request: KT-MR-7052
Merged-by: Nikolay Lunyak <lunyak.kolya@mail.ru>

compiler/fir/analysis-tests/testData/resolve/nestedAnnotationConstExprArguments.kt

@@ -0,0 +1,14 @@
+annotation class InnerAnnotation(val text: String)
+annotation class OuterAnnotation(val inner: InnerAnnotation)
+
+@OuterAnnotation(InnerAnnotation(text = "x" + "x"))
+class Payload
+
+@InnerAnnotation(text = "x" + "x")
+class Payload2
+
+@OuterAnnotation(InnerAnnotation(text = "x"))
+class Payload3
+
+@OuterAnnotation(InnerAnnotation("x" + "x"))
+class Payload4