[PLAT-4567] Switching curve builders to use new curve construction objects
[PLAT-4567] Finishing the switch to the multi-curve bundles
[PLAT-4567] Finishing the switch to the multi-curve bundles
[TMPL-36] Added an option to the FX spot series function that will return either relative or absolute shifts. This is propagated upwards to the FX Currency Exposure P&L functions