Rename x509_util_ios_and_mac.h to x509_util_apple.h

Align with options like is_apple and BUILDFLAG(IS_APPLE). I'm told this
is the preferred name for shared macOS/iOS code these days, and this
file indeed wraps symbols common to all Apple platforms. (The history
here is that the macOS/iOS security APIs initially did not align, but
nowadays they match, if you avoid the deprecated macOS-only CSSM stuff,
and have a new enough macOS version.)

Change-Id: I983b325f310474031ec23f717a4207f286cb7e68
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3659374
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Matt Mueller <mattm@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1007631}
NOKEYCHECK=True
GitOrigin-RevId: 33a59b1c62b0e2b61be45fef4d707dedcb3c1e64
4 files changed