test: proposal data edit screen navigation

[kneerose]

List of changes

• Add test to navigation edit proposal page on metadata anchor url error modal 'go to data edit screen' button click

Checklist

• related issue
• [x] My changes generate no new warnings
• [x] My code follows the style guidelines of this project
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the changelog
• [ ] I have added tests that prove my fix is effective or that my feature works

[github-actions[bot]]

:white_check_mark: All checks succeeded

[github-actions[bot]]

:white_check_mark: All checks succeeded

[github-actions[bot]]

:white_check_mark: All checks succeeded

[github-actions[bot]]

@kneerose This PR is in the tag: develop-bec09ed501f60b764c764da261797088312155d2 , for govtool-frontend service

[github-actions[bot]]

@kneerose This PR is in the tag: develop-bec09ed501f60b764c764da261797088312155d2 , for govtool-metadata-validation service

[github-actions[bot]]

@kneerose This PR is in the tag: develop-bec09ed501f60b764c764da261797088312155d2 , for govtool-backend service