drivers console: Deprecate native_posix_console.h

Deprecate this header which provides API compatibility since
the header was renamed in 2023, but was never deprecated.
Planned for removal in v4.4.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
diff --git a/include/zephyr/drivers/console/native_posix_console.h b/include/zephyr/drivers/console/native_posix_console.h
index 6a4429ab..c68f132 100644
--- a/include/zephyr/drivers/console/native_posix_console.h
+++ b/include/zephyr/drivers/console/native_posix_console.h
@@ -7,6 +7,9 @@
 #ifndef ZEPHYR_INCLUDE_DRIVERS_CONSOLE_NATIVE_POSIX_CONSOLE_H_
 #define ZEPHYR_INCLUDE_DRIVERS_CONSOLE_NATIVE_POSIX_CONSOLE_H_
 
+#warning "This header is now deprecated and will be removed by v4.4. "\
+	 "Use posix_arch_console.h instead."
+
 /*
  * This header is left for compatibility with old applications
  * The console for native_posix is now provided by the posix_arch_console driver