Route PCNT unit interrupts through private shared groups bound by module
name so units in the same PCNT instance share one CPU line without
allowing other peripherals to join. Remove redundant PCNT-side priority
conflict checks and rely on the interrupt allocator for conflict
validation.
Switch the PCNT test app to unity leak utilities and clean newlib reent
state during teardown so leak checks are more stable with lazy
allocations.
- Removed conditional definitions for various RCC_ATOMIC macros across
multiple files, replacing them with a unified PERIPH_RCC_ATOMIC() macro.
- Updated instances where specific RCC_ATOMIC macros were used to ensure
consistent usage of PERIPH_RCC_ATOMIC().
- Deleted unused uart_share_hw_ctrl.h file as its functionality is now
integrated into the new structure.
Currently, due to the lack of sleep callback feature. We only init
sleep module but don't allocate it. Thus the power domain will be
kept during the light sleep. And temporarily disable pcnt sleep
retention support on P4 due to the lack of retention module ID.
