Add manual env deployment option

[RMcVelia]

Context

Add manual deployment option to the build and deploy workflow

Changes proposed in this pull request

Updates to build_and_deploy.yml

Guidance to review

check workflow still runs as expected (build/deploy review on label)

• see https://github.com/DFE-Digital/claim-additional-payments-for-teaching/actions/runs/11935131851

check code

[github-actions]

Deployments

Journey	URL
Additional Payments	https://claim-additional-payments-for-teaching-review-3418-web.test.teacherservices.cloud/additional-payments/claim
Student Loans	https://claim-additional-payments-for-teaching-review-3418-web.test.teacherservices.cloud/student-loans/claim
Further Education	https://claim-additional-payments-for-teaching-review-3418-web.test.teacherservices.cloud/further-education-payments/landing-page
Early Years Payment	https://claim-additional-payments-for-teaching-review-3418-web.test.teacherservices.cloud/early-years-payment/landing-page
Relocation Payments	https://claim-additional-payments-for-teaching-review-3418-web.test.teacherservices.cloud/get-a-teacher-relocation-payment/landing-page
Admin	https://claim-additional-payments-for-teaching-review-3418-web.test.teacherservices.cloud/admin

[RMcVelia]

Claims: plan DR test