[JS IR] Export protected members too

#KT-47524 Fixed
#KT-47525 Fixed

js/js.translator/testData/box/export/exportProtectedMembers.kt

@@ -0,0 +1,53 @@
+// EXPECTED_REACHABLE_NODES: 1265
+// RUN_PLAIN_BOX_FUNCTION
+// INFER_MAIN_MODULE
+// SKIP_MINIFICATION
+// SKIP_NODE_JS
+// SKIP_DCE_DRIVEN
+
+// MODULE: exportProtectedMembers
+// FILE: lib.kt
+
+@JsExport
+open class Foo protected constructor() {
+    protected fun bar(): String = "protected method"
+
+    private var _baz: String = "baz"
+
+    protected var baz: String
+        get() = _baz
+        set(value) {
+            _baz = value
+        }
+
+    protected class NestedClass {
+        val prop: String = "nested class property"
+    }
+    protected object NestedObject {
+        val prop: String = "nested object property"
+    }
+
+    protected companion object {
+        val prop: String = "companion object property"
+    }
+}
+
+// FILE: test.js
+function box() {
+    foo = new exportProtectedMembers.Foo();
+
+    if (foo.bar() != 'protected method') return 'failed to call protected method';
+    if (foo.baz != 'baz') return 'failed to read protected property';
+    foo.baz = 'beer';
+    if (foo.baz != 'beer') return 'failed to write protected property';
+
+    nestedClass = new exportProtectedMembers.Foo.NestedClass()
+    if (nestedClass.prop != 'nested class property')
+        return 'failed to read protected class property'
+    if (exportProtectedMembers.Foo.NestedObject.prop != 'nested object property')
+        return 'failed to read protected nested object property'
+    if (exportProtectedMembers.Foo.Companion.prop != 'companion object property')
+        return 'failed to read protected companion object property'
+
+    return 'OK';
+}