LIMS-2125: Allow use of shipping service for EU dispatches

[ndg63276]

JIRA ticket: LIMS-2125

Summary:

The next step in migration to the shipping service is for users from EU (and some other) countries to use it, for outgoing (dispatch) shipments. This will be behind a feature flag, and should probably not be enabled until ULIMS-1186 is completed.

Changes:

• Add new boolean feature flag use_shipping_service_nde
• Update the callback function for shipping service confirmations to cope with pending requests, booked requests and cancellations
• Only email users / goods handling after the shipment is booked, not when requested
• Tidy up some repeated code into functions
• Allow dots in country names as some countries in our list have dots in (eg Dominican Rep.)

To test:

• Currently deployed on ispyb-test for easier testing
• Go to any proposal (eg mx23694), edit a lab contact to be in France. Make a shipment with that lab contact.
• Don't worry about booking the incoming shipment, just click "Dispatch" next to the dewar
• On the next page, make sure the country still says France, and click "Use Facility Account". Check the firm shrinks to the minimal version.
• Change the country to somewhere outside Europe, check the form expands again. Set it back to France.
• Click Proceed and check you are taken to the shipping service test server.
• Change your country to France, use a valid French post code (eg 12345) and a valid French EORI number (eg FR123456789)
• Click Next then Submit, check it says a member of staff will book the shipment.
• Click Done and check you are taken back to your shipment in Synchweb. If ULIMS-1186 is done, you should see a status of "dispatch-requested".
• Check the Dispatch button has now become "View Dispatch Request", which takes you back to the shipping service.
• James or Mark should have an email asking them to book the shipment, get them to put in a tracking number. Check the dewar status becomes "dispatch-booked" and the tracking number appears in Synchweb.
• Click through to the shipping service again, and click to Cancel to shipment. Check Synchweb now says "Dispatch request cancelled"