This commit fixes a bug wherein an incorrect bit-width of 0 was being
used while reading the RTC_CNTL_LOW_POWER_ST_REG in ulp_fsm example code
while judging whether the system is ready for wakeup. The correct value
should be a bit-width of 1 to read bit#27 (RTC_CNTL_MAIN_STATE_IDLE) of
the RTC_CNTL_LOW_POWER_ST_REG register on esp32.
This commit enables ULP FSM support for esp32s3 and updates ULP FSM code
flow for other chips.
It adds C Macro support for the ULP FSM instruction set on esp32s2 and
esp32s3.
The unit tests are also updated to test ULP FSM on ep32s2 and esp32s3.
