libc-wasi: Make rights of STDIN/STDOUT/STDERR fixed and overlook their access modes (#3694)

When determining the file descriptor rights in the function fd_determine_type_rights(),
we assign fixed and unchangeable rights to STDIN, STDOUT and STDERR.

ps.
https://github.com/bytecodealliance/wasm-micro-runtime/issues/3686

core/shared/platform/include/platform_api_extension.h

@@ -1502,6 +1502,33 @@ os_convert_stdout_handle(os_raw_file_handle raw_stdout);
 os_file_handle
 os_convert_stderr_handle(os_raw_file_handle raw_stderr);
 
+/**
+ *
+ * @param fd a file handle
+ *
+ * @return true if it is stdin
+ */
+bool
+os_is_stdin_handle(os_file_handle fd);
+
+/**
+ *
+ * @param fd a file handle
+ *
+ * @return true if it is stdout
+ */
+bool
+os_is_stdout_handle(os_file_handle fd);
+
+/**
+ *
+ * @param fd a file handle
+ *
+ * @return true if it is stderr
+ */
+bool
+os_is_stderr_handle(os_file_handle fd);
+
 /**
  * Open a directory stream for the provided directory handle. The returned
  * directory stream will be positioned at the first entry in the directory.