Ad parity

[arelra]

We should track ad parity for DCR vs Frontend network fronts.

D&I are working on creating an ad parity tracker.

We should agree the roll out % and schedule with D&I and Commercial dev

### Tasks
- [x] D&I to refresh ad parity tracker
- [x] mobile-6 ad slot is missing on the international front
- [x] merchandising-high and mobile1 slots differ in position compared to Frontend
- [x] mobile and desktop slots should be removed from the dom when not at that breakpoint

[arelra]

mobile6-inline is fixed by: https://github.com/guardian/dotcom-rendering/pull/8112

[arelra]

slots positioning parity fixed by: https://github.com/guardian/dotcom-rendering/pull/8126

[rhiannareechaye]

https://docs.google.com/spreadsheets/d/1SKBBciRIWuxfXmTjGx0_CwbQktU5C2BP8h-hzHgmFIQ/edit#gid=1391693339

[rhiannareechaye]

Can we take a look at this too please:

one quick one - I noticed the cycling had an ad slot missing on DCR on first slice of first container https://www.theguardian.com/sport/cycling?dcr=false vs https://www.theguardian.com/sport/cycling?dcr=true

[arelra]

cycling had an ad slot missing on DCR

This is a tagged front for which ad slot support has just been merged with: https://github.com/guardian/dotcom-rendering/pull/8056

We should be seeing ad slots on tagged fronts appear soon

[arelra]

Mobile and desktop slot hiding closed by: https://github.com/guardian/dotcom-rendering/pull/8263