Rename TTF view from CreditCard* to PaymentMethod*

This CL renames TTF controller/view related files from CreditCard*
into PaymentMethod* as IBAN will be supported soon.

Bug: b:309163063
Change-Id: I1994d3dde78fdf4337df252f280b7149e8cd63dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5398576


Reviewed-by: Vishwas Uppoor <vishwasuppoor@google.com>
Reviewed-by: Jan Keitel <jkeitel@google.com>
Commit-Queue: Qihui Zhao <qihuizhao@google.com>
Reviewed-by: Olivia Saul <jsaul@google.com>
Reviewed-by: Timofey Chudakov <tchudakov@google.com>
Cr-Commit-Position: refs/heads/main@{#1283162}