[NBS 1.0] deprecate legacy service builder

[camilaibs]

Hey, I just made a Pull Request!

Refs: https://github.com/backstage/backstage/issues/24803

It is part of the effort to deprecate the legacy backend system and this pull request deprecates the service builder.

:heavy_check_mark: Checklist

• [x] A changeset describing the change and affected packages. (more info)
• [ ] Added or updated documentation
• [ ] Tests for new functionality and regression tests for bug fixes
• [ ] Screenshots attached (for UI changes)
• [x] All your commits have a Signed-off-by line in the message. (more info)

[backstage-goalie[bot]]

Changed Packages

Package Name	Package Path	Changeset Bump	Current Version
@backstage/backend-common	packages/backend-common	patch	v0.22.0
@backstage/plugin-app-backend	plugins/app-backend	patch	v0.3.66
@backstage/plugin-auth-backend	plugins/auth-backend	patch	v0.22.5
@backstage/plugin-catalog-backend	plugins/catalog-backend	patch	v1.22.0
@backstage/plugin-devtools-backend	plugins/devtools-backend	patch	v0.3.4
@internal/plugin-todo-list-backend	plugins/example-todo-list-backend	none	v1.0.27
@backstage/plugin-proxy-backend	plugins/proxy-backend	patch	v0.4.16
@backstage/plugin-search-backend	plugins/search-backend	patch	v1.5.8
@backstage/plugin-techdocs-backend	plugins/techdocs-backend	patch	v1.10.5
@backstage/plugin-user-settings-backend	plugins/user-settings-backend	patch	v0.2.17

[github-actions[bot]]

Thank you for contributing to Backstage! The changes in this pull request will be part of the 1.28.0 release, scheduled for Tue, 18 Jun 2024.

[github-actions[bot]]

Uffizzi Cluster pr-24814 was deleted.