Convert prepare permutive to TS

[Jakeii]

What does this change?

Convert prepare-permutive and it's test to typescript.

Tested on CODE to make sure permutive API being called and targeting being added to ad requests.

Does this change need to be reproduced in dotcom-rendering ?

• [x] No
• [ ] Yes (please indicate your plans for DCR Implementation)

Screenshots

What is the value of this and can you measure success?

Checklist

Does this affect other platforms?

• [ ] AMP
• [ ] Apps
• [ ] Other (please specify)

Does this affect GLabs Paid Content Pages? Should it have support for Paid Content?

• [ ] No
• [ ] Yes (please give details)

Does this change break ad-free?

• [ ] No
• [ ] It did, but tests caught it and I fixed it
• [ ] It did, but there was no test coverage so I added that then fixed it

Does this change update the version of CAPI we're using?

• [ ] No, all the existing database files are just fine
• [ ] Yes, and I have re-run all the tests locally and checked in all the updated data/database/xyz files

Accessibility test checklist

• [ ] Tested with screen reader
• [ ] Navigable with keyboard
• [ ] Colour contrast passed

Tested

• [x] Locally
• [x] On CODE (optional)