K2: reproduce KT-57954 and reorganize tests around enum entries warnings

In particular, here we add FIR_DUMP to all enum entries tests with
some deprecation diagnostics and the feature on, and remove all txt-files

compiler/testData/diagnostics/tests/enum/entries/entriesPropertyWithJvmStaticClashOn.fir.kt

@@ -0,0 +1,22 @@
+// !LANGUAGE: +EnumEntries
+// WITH_STDLIB
+// FIR_DUMP
+
+enum class A {
+    ;
+
+    companion object {
+        @JvmStatic
+        val entries = 0
+    }
+}
+
+fun test() {
+    A.entries
+
+    with(A) {
+        entries
+    }
+
+    A.Companion.entries
+}