Qualification results page backlink behaviour

[RobertGHippo]

Description

Change the target of the back link on the results page, depending on the user's journey to that page.

Ticket number (if applicable)

EYQB-487

How Has This Been Tested?

Runs locally; new unit and e-2-e tests.

Checklist:

• My code follows the standards used within this project
• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests (Unit, E2E) that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[github-actions]

Package	Line Rate	Branch Rate	Health
Dfe.EarlyYearsQualification.Content	92%	92%	✔
Dfe.EarlyYearsQualification.Web	96%	89%	✔
Dfe.EarlyYearsQualification.Mock	100%	100%	✔
Summary	96% (3110 / 3247)	91% (474 / 520)	✔

Minimum allowed line rate is 90%