shell: update shell_uart backend test condition

New shell does not need either CONFIG_UART_CONSOLE
or interrupts support to be working. Only CONFIG_SERIAL
in combination with CONFIG_UART_SHELL_ON_DEV_NAME are required.
Updated sample yaml file accordingly.

Signed-off-by: Jakub Rzeszutko <jakub.rzeszutko@nordicsemi.no>
1 file changed