[Wasm] Add external declaration diagnostics (KT-56940)

Prohibit:
- external enum class
- external tailrec fun
- external suspend fun
- external lateinit var

Add tests for other external diagnostics inherited from K/JS

compiler/testData/diagnostics/wasmTests/jsInterop/external.kt

@@ -0,0 +1,51 @@
+
+// Classes
+
+external class C1
+
+external enum class <!WRONG_EXTERNAL_DECLARATION!>C2<!>
+
+external annotation class <!WRONG_EXTERNAL_DECLARATION!>C3<!>
+
+external data class <!WRONG_EXTERNAL_DECLARATION!>C4(val x: String)<!>
+
+external class C5 {
+
+    class C6
+
+    inner class <!WRONG_EXTERNAL_DECLARATION!>C7<!>
+}
+
+external <!INLINE_CLASS_DEPRECATED!>inline<!> class <!WRONG_EXTERNAL_DECLARATION!>C8(<!EXTERNAL_CLASS_CONSTRUCTOR_PROPERTY_PARAMETER!>val x: Int<!>)<!>
+
+external value class <!WRONG_EXTERNAL_DECLARATION!>C9(<!EXTERNAL_CLASS_CONSTRUCTOR_PROPERTY_PARAMETER!>val x: Int<!>)<!>
+
+
+// Interfaces
+
+external interface I1
+
+external fun interface <!WRONG_EXTERNAL_DECLARATION!>I2<!> {
+    fun foo(): Int
+}
+
+
+// Functions
+
+external fun foo1(): Int
+
+<!WRONG_EXTERNAL_DECLARATION!>external tailrec fun foo2(): Int<!>
+
+<!INLINE_EXTERNAL_DECLARATION!>external inline fun foo3(f: () -> Int): Int<!>
+
+<!WRONG_EXTERNAL_DECLARATION!>external suspend fun foo4(): Int<!>
+
+<!WRONG_EXTERNAL_DECLARATION!>external fun Int.foo5(): Int<!>
+
+
+// Properties
+
+<!WRONG_EXTERNAL_DECLARATION!>external lateinit var v1: String<!>
+
+<!WRONG_EXTERNAL_DECLARATION!>external val Int.v2: String<!>
+    get() = definedExternally