Rename *FillAutofillFormData* to *AutofillForm*

The name was long and redundant. This CL was auto-generated.

Bug: 447333980
Change-Id: I00c2a65b5cfc85b50728b261ea03f00bd6d93369
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6988729
Auto-Submit: Jihad Hanna <jihadghanna@google.com>
Commit-Queue: Jihad Hanna <jihadghanna@google.com>
Reviewed-by: Jan Keitel <jkeitel@google.com>
Reviewed-by: Camille Lamy <clamy@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1521265}