feat: Allow to show what happened during EpochExecution in the reporting tab

[mustermeiszer]

Currentyly we have the following period filter options for reporting:

We need to extend that to have another option Epoch where the points in time that are shown are based on when an epoch was closed.

Requierement

• The Epoch-filter MUST be supported for the BalanceSheet report
• The Epoch-filter CAN be supported for the CashFlow report
• The Epoch-filter CAN be supported for the ProfitAndLoss report

NOTE: A nice to have would be to have the date of each entry in the tables in this case be a link to the associated block on subscan!

[mustermeiszer]

Investor tx still broken on this preview: https://pr2444-app-ff-production.k-f.dev/#/pools/4139607887/reporting/investor-tx is this expected