[Survey Accounts] Batch send surveys

[victori444]

Brief summary of changes

In add survey, changes the instrument select to a multiselect and includes a link to every selected instrument in the email

• Have you updated related documentation?

Testing instructions (if applicable)

1. Add a survey in the Survey Accounts module
2. For some candidate, select multiple instruments and set an email
3. Submit with "Email survey" and verify the email is sent and received with a link to each instrument + both surveys exist in the table with distinct links

Link(s) to related issue(s)

• Resolves Batch send surveys #8984