RMT character driver should be removed from drivers

### Description

The RMT character driver is ESP vendor specific peripheral so it belongs to `arch/` not common `drivers/` code.
This driver should use portable drivers to implement specific functions like `drivers/rc/lirc_dev.c`.
Discussion about the problem can be found in https://github.com/apache/nuttx/pull/11428


### Verification

- [X] I have verified before submitting the report.