Add most read to Index pages

[JonBeeb]

Is your feature request related to a problem? Please describe.
Add most read to amp STY pages
Most read can be seen on canonical pages
https://www.bbc.com/pidgin
but is missing from the AMP
https://www.bbc.com/pidgin.amp

Describe the solution you'd like
Add most read to the AMP index pages

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Testing notes
[Tester to complete]

Dev insight: Will Cypress tests be required or are unit tests sufficient? Will there be any potential regression? etc

• This feature is expected to need manual testing.

Checklist

• (BBC contributors only) This issue follows the repository use guidelines

Additional context
Add any other context or screenshots about the feature request here.