Eliminate UT_T1_GPIO runner requirement by routing internally through gpio matrix and by setting gpio pins to GPIO_MODE_INPUT_OUTPUT mode for all interrupt related test cases.
By using IOMUX instead of GPIO Matrix for UART, it is now possible
on ESP32 boards to use the UART as a wake up source even if it is
not used as a console.
For other boards where this issue was not present, using IOMUX has
the advantage to be faster than using GPIO matrix, so a highest
baudrate can be used
