tests: drivers: pwm: Add PWM support for Renesas RZ/T2M, N2L, V2L

Add PWM test support for Renesas RZ/T2M-RSK, RZ/N2L-RSK, RZ/V2L-SMARC

Signed-off-by: Hieu Nguyen <hieu.nguyen.ym@bp.renesas.com>
Signed-off-by: Tien Nguyen <tien.nguyen.zg@renesas.com>