next.js

8fef7021 - [15.x] Default deploy e2e tests to the repo next version (#96899)

[15.x] Default deploy e2e tests to the repo next version (#96899) Backports #96895 to `next-15-5`, adapted to this branch's layout (a single `test-deploy` job, no adapter jobs). This branch had a bug where `test-deploy` resolved `NEXT_TEST_VERSION` as `github.event.inputs.nextVersion || 'canary'`, so release runs always installed `canary` and ignored the released version.