release_3279

All PRs to be released

#2572 Content changes to same sex marriages in Germany
#2610 Register a birth Libya
#2609 Register a death - Libya
#2601 Remove hyphen from "re-generate", "re-generates" & "re-generating" in documentation
#2614 Refactor state-pension-topup to new-style flow (with feedback addressed)
#2593 Avoid using worldwide API helpers in regression tests
#2597 Split marriage-abroad outcome for Dominican Republic
#2615 Refactor pay-leave-for-parents to new-style flow (with feedback addressed)
#2583 Add document about development workflow
#2616 Update documentation to include on_response blocks (with feedback addressed)
#2598 Split marriage-abroad outcome for Brazil
#2619 Refactor register-a-birth to new-style flow (with feedback addressed)

PRs to be checked

#2572 Content changes to same sex marriages in Germany
#2610 Register a birth Libya
#2609 Register a death - Libya