#6287644 Jetpack site-less Checkout: hide references to `siteless.jetpack.com` domain from Purchases section

Changes proposed in this Pull Request

• Remove references to siteless.jetpack.com from the Purchases section that don’t add useful information and might be confusing to some users.

Testing instructions

• Run this PR locally with yarn start.
• Sandbox public-api.wordpress.com.
• Enable USE_STORE_SANDBOX so you can use a fake credit card (using credits makes appear many other warnings in the Purchase section and we won’t be dealing with them on this PR).
• Purchase a product and a plan.
• Visit the /me/purchases section.
• Make sure the purchases look like in the PR (you should not see any reference to siteless.jetpack.com).
• Visit the purchase records of both the product and the plan.
• Make sure the purchase records look like in the PR (you should not see any reference to siteless.jetpack.com).
• Go through the cancellation flow and make sure the last step looks like the capture below (no references to siteless.jetpack.com).

Related to 1200479326344990-as-1200641987599725

Demo

The images on the left correspond to how things look now in production, on the right how they look after these changes.

/me/purchases

/me/purchases/siteless.jetpack.com/:purchaseId – Product view

/me/purchases/siteless.jetpack.com/:purchaseId – Plan view

/me/purchases/siteless.jetpack.com/:purchaseId – Cancel product modal

/me/purchases/siteless.jetpack.com/:purchaseId – Cancel plan modal