Bug 30167: Use returned renewal date rather than fetching

Bug 30167: Use returned renewal date rather than fetching

This patch updates the three scripts that fetched the soonest renewal date
to use the return from CanBookBeRenewed

To test:
1 - Set a circulation rule with a 'no renewal before' set to 3, loan length set to 5
2 - Check out an item to a patron that uses this rule
3 - Verify the checkouts for the patron show the correct 'No renewal before' date
4 - Sign in to the patron's opac account
5 - Verify the item shows it cannot be renewed, and shows the correct date
6 - Go to Circulation->Renew
7 - Attempt to renew using barcode
8 - Confirm error shows the soonest renewal date

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>