[infra] Cherry-pick changes to get iOS bots going again on non-main branches.

Cherry-picked from commit 60c80a0d73ba552f4235eb8180d53d8767e83693.

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[infra] Remove the libimobiledevice dimension.

Cherry-picked from 5c1672406a7a3315a52bf8270d6b646eebf3c9ff on main.

I strongly suspect we no longer need this, since it's been 9 months.
More importantly, this number is just the modification time of the
idevice_id binary on the RPi image
(https://chrome-internal.googlesource.com/infradata/config/+/refs/heads/
main/configs/chromium-swarm/scripts/skia_mobile.py#1008), and that
number changes on the rpi2-* image, so leaving this here would prevent
any jobs from ever running on the machines we're moving to.

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[infra] Update iOS provisioning profile.

Cherry-picked from 9b35cd642f98259a858eec0075c1b75b9188601e on main.

* Remove 3 iPad Pro 9.7"s killed in the March 2020 Skolo flood.
* Add skia-iphone-8-03, which was mysteriously missing.

Change-Id: I062884b11f02b69125bd5ae6523089dfb9c19acb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/479678
Reviewed-by: Eric Boren <borenet@google.com>
3 files changed