Bug 33398: Add primary_contact_method to display when triggering a waiting hold

Bug 33398: Add primary_contact_method to display when triggering a waiting hold

To test:
1. Apply patch, yarn build
2. Trigger a waiting hold for a patron that has a value for primary_contact_method
3. Notice the modal now includes a line indicating the primary_contact_method.
4. Trigger a hold for a patron without a primary_contact_method. Nothing should display.

Signed-off-by: Laura Escamilla <laura.escamilla@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>