[Tag Pages] Pagination missing on /all URLs

[cemms1]

Pagination missing on /all tag pages

Example URL: https://www.theguardian.com/sport/all

Should look like the following screenshot:

[alinaboghiu]

This will be because we never implemented /all: #8321

[ioannakok]

Specifically, it's the /all.json route that's missing. Once we add it, these will stop returning 404: https://www.theguardian.com/sport/all.json?dcr

And then we have to add the pagination data for /all pages to the DCR model. Atm we're only sending pagination data for regular tag pages (e.g. https://www.theguardian.com/politics/michaelgove.json?dcr). In regular tag pages pagination comes from Tag

In /all pages pagination comes from Metadata

[abeddow91]

### Tasks
- [ ] Add all.json route to Frontend 
- [ ] Add all.json route to Platform router
- [ ]  pass pagination from frontend to DCR
- [ ]