Add Job Information to Job Page Metadata

The job page was missing metadata titles and descriptions relevant to each job, this MR fixes this.

View a job listing on the preview site - you can also use tools such as https://metatags.io/ to preview how the page will appear on social media.

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[x] Add a description of your pull request and instructions for the reviewer to verify your work.
[x] If your pull request is for a specific ticket, link to it in the description.
[x] Stay on point and keep it small so the merge request can be easily reviewed.
[x] Consider adding unit tests, especially for bug fixes. If you don't, tell us why.
[x] Tests and linting passes.
[x] Consider updating documentation. If you don't, tell us why.
[x] If relevant, list the environments / browsers in which you tested your changes.

torchbox / careers