Port RTC Pin module extension

[purewack]

I'm working on updating the ADC module to use the new esp_adc component and to avoid deprecation warnings. I'm doing this mainly to fix an issue with the ULP RISCV, where there is a driver conflict because in order to initiate the adc for the ULP, we need to use a function that is a part of the new adc driver. I've mentioned this in my PR #16469 but I got everything working.

The ULP also needs to have RTC pins setup if you plan on using output with the ULP by first calling esp-idf rtc_gpio... functions.

Will it be better to add functions like adc_setup() and rtc_pin_out() to the ULP module, or should I extend the ADC and Pin modules respectively?