Adds AUTOFILL_LOYALTY_CARD data type to sync client side.

This data type is added as the 'Payments' user selectable type.

This CL is a first CL of many following 'Sync Integration Checklist'.

Bug: 393119606
Change-Id: Ib5aa869734b1d3db02104491e91be622b195eaf5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6295603
Reviewed-by: Norge Vizcay <vizcay@google.com>
Commit-Queue: Piotr Wrótniak <piotrwrotniak@google.com>
Reviewed-by: Rushan Suleymanov <rushans@google.com>
Cr-Commit-Position: refs/heads/main@{#1424407}