Fixed action name in JobsController

What does this MR do?

Fixes the method used in the before action authorize_use_build_terminal in JobsController from terminal_workhorse_authorize to terminal_websocket_authorize. Port of https://gitlab.com/gitlab-org/gitlab-ee/commit/dfd4ec0ebb9a040b1fce58cf8281eb241a7bdd01#7b728fdfe2bea5b9b3bb2507b97e8a8cea97ee68

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• 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
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer