Regularly reset iOS/tvOS Simulators

Context

The Simulators are slowing down as they are being used. The folder with their data grows substantially. I did an analysis and found sizes up to 12 GB, most frequently ranging from 2 to 7 GB. This is a potential cause of the slowdown.

To be done

XHarness has a command that wipes the Simulator data and resets the Simulator. We should do this repeatedly on our OSX queues to keep them healthy.

A good fit might be the weekly OSOB pipeline?

Notes

Simulators can be reset via following Helix job:

sudo rm -rf /Users/helix-runner/.dotnet # some machines have global .NET installed and there are permission problems
curl -sL aka.ms/get-xharness | bash -
export DOTNET_ROOT=./.dotnet

# Reset iOS
sid=`./xharness apple device ios-simulator-64`
du -sh ~/Library/Developer/CoreSimulator/Devices/$sid
./xharness apple simulators reset-simulator -o . -t ios-simulator-64
du -sh ~/Library/Developer/CoreSimulator/Devices/$sid

# Reset tvOS
sid=`./xharness apple device tvos-simulator`
du -sh ~/Library/Developer/CoreSimulator/Devices/$sid
./xharness apple simulators reset-simulator -o . -t tvos-simulator
du -sh ~/Library/Developer/CoreSimulator/Devices/$sid"

Build	Kind	Start Time
1863024	Rolling	2022-06-07
1865333	Rolling	2022-07-07
1867636	Rolling	2022-08-07

[premun]

This PR moves runtime onto 12.00 with newer simulators that have never been reset. Let’s see if this alleviates the issue

[premun]

The original reset we talked about and are not going to do but the unrelated issue discussed below has been resolved by https://github.com/dotnet/arcade/issues/11700