(DOCSP-34607) Builds 7.0 docs with new gen and resolves errors (#4)

[Jira](https://jira.mongodb.org/browse/DOCSP-34607)

[Staging](https://preview-mongodbsarahsimpers.gatsbyjs.io/ops-manager/DOCSP-34607/)

[Build](https://workerpool-boxgs.mongodbstitch.com/pages/job.html?collName=queue&jobId=657e05e07a5cb5fef5d15ca9)
Builds without errors!

Cherry-picks from https://github.com/10gen/docs-ops-manager/pull/5 plus
a few cleanup commits

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Co-authored-by: Evelyn Rabil <[email protected]>

Author: sarahsimpers