CMIP7: UKCM2 processor apply_SI3_V_coordinates

[mo-laurenboon]

In order to produce some variables, a processor is required to apply the correct coordinates.

The variables that currently require this processor (as per their mapping information) are as follows:

Grid	Variable	Mapping Information
mip_convert_ind_ocean-native-icemod	siv_tavg-u-hxy-si	1695
mip_convert_inm_ocean-native-icemod	siv_tavg-u-hxy-si	1791
mip_convert_inm_ocean-native-icemod	sistrxubot_tavg-u-hxy-si	1782
mip_convert_inm_ocean-native-icemod	sistryubot_tavg-u-hxy-si	1784
mip_convert_inm_ocean-native-icemod	siforcecorioly_tavg-u-hxy-si	1740
mip_convert_inm_ocean-native-icemod	siforceintstry_tavg-u-hxy-si	1742
mip_convert_inm_ocean-native-icemod	siforcetilty_tavg-u-hxy-si	1744