Consider making estimations handle hourly timestamps and emissions factors

[ericksod]

• new calculations use most up to date emissions factors

• consider way to not have this affect older data/calculations (use factor from the correct period of time)

• Note this may be feasible using Electricity Maps but may not be as feasible for static/average emissions factor coefficient options

[ng-druid]

@ericksod The calculation can be even more accurate using real time grid intensity levels. https://github.com/cloud-carbon-footprint/cloud-carbon-footprint/issues/972