[ios] Use ProfileIOS alias in ProfileManagerIOS and sub-classes

With https://crrev.com/c/5826657 it is now possible to use the name
ProfileIOS to refer to a profile, so convert ProfileManagerIOS and
its sub-classes to this new name.

Change ProfileIOS::Delegate API and ProfileIOS::CreateProfile(...)
methods to also use this name since ProfileManagerIOS is the sole
client of those APIs.

Bug: 358053899
Change-Id: Id2a5bce3063ccece0a69d31bbbbdc9135180f05f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5824637
Reviewed-by: Federica Germinario <fedegermi@google.com>
Auto-Submit: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Federica Germinario <fedegermi@google.com>
Cr-Commit-Position: refs/heads/main@{#1349234}