publish v12.2 reference docs

[maribethb]

We need to publish new reference docs, but there's a few issues:

• The gulpfiles were converted to mjs from cjs in build: Refactor gulpfiles from CJS to ESM #9149 but some imports are not in the correct format, so the docs_tasks gulp tasks fail (header and replace need to be imported differently)
• I'm having some issues with ajv (a dependency of one of the dependencies) that I resolved by just installing a later version of ajv manually, which I'm sure isn't the correct solution, but I don't know what else to try and it works so whatever
• api-documenter switched to using html tables instead of markdown tables, so the code that builds the _toc.yaml file we need for the table of contents doesn't work. this will require the most work to fix.

[maribethb]

I did all of the work to properly parse the toc from the html table output, but didn't realize that the markdown parser used by devsite doesn't support markdown inside of html tables, so the toc is not the only thing broken. T_T