* Use benchmarking v2 in collator selection pallet

Signed-off-by: georgepisaltu <george.pisaltu@parity.io>

* Use extrinsic_call syntax

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Replace `block` with `extrinsic_call` syntax

Signed-off-by: georgepisaltu <george.pisaltu@parity.io>

---------

Signed-off-by: georgepisaltu <george.pisaltu@parity.io>
Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>