[EE] Externalize strings from 'app/views/projects/services'

(Reopening of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14839).

CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/32402

What does this MR do?

Externalize strings from app/views/projects/services, as part of https://gitlab.com/gitlab-org/gitlab-ce/issues/47670.

Reopened from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/19822.

What are the relevant issue numbers?

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/47670.

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Security reports checked/validated by reviewer