`esp32` - issue with `RSA` peripheral

[playfulFence]

Encountered a problem during implementing https://github.com/esp-rs/esp-hal/pull/790 : Program run hangs in this or similar blocks -> seems to be stuck in non-idle mode.

One idea where the problem is: Every other chip (except of esp32) has a separate register for handling IDLE state (RSA_IDLE_REG for esp32sX or RSA_QUERY_IDLE for esp32cX), but on esp32 it's checked through the interrupt register on which async functionality depends -> conflict