with esp_rom_delay_us in test_apps
This commit replaces vTaskDelay with esp_rom_delay_us in the gptimer
driver. The former function can introduce millisecond jitter due to
OS task switching, while the latter has less jitter because of the
polling delay. Therefore this commit reduces the delta values for
various timer tests.
Changes made in this commit include:
- Replacing vTaskDelay with esp_rom_delay_us
- Adjusting delta values for various timer tests
GPTimer on C6 supports RC_FAST as the clock source. The benefit of this
clock is that, the clock can sustain in light sleep.
Added a new API to return the real resolution of the timer handle.
This commit removes the usage of all legacy FreeRTOS data types that
are exposed via configENABLE_BACKWARD_COMPATIBILITY. Legacy types can
still be used by enabling CONFIG_FREERTOS_ENABLE_BACKWARD_COMPATIBILITY.
