Promote aarch64-apple-ios-sim to Tier 2

[badboy]

With #81966 landed it's possible to build for the arm64 iOS simulator on M1 devices.

cargo +nightly build -Z build-std --target aarch64-apple-ios-sim

It would be nice to promote aarch64-apple-ios-sim to Tier 2 so users can get the pre-built libstd using rustup.

What steps are necessary to do that? I'm happy to do the work.
And who's to sign off on that?

/cc @deg4uss3r who did the initial work.

[jyn514]

You may want to ask T-infra on Zulip, you'll likely get more feedback there.

[badboy]

You may want to ask T-infra on Zulip, you'll likely get more feedback there.

Done.

[daltonclaybrook]

Any update on this?

[badboy]

With the Target tier policy written out I plan to post a MCP next week to get the process kicked off.

[badboy]

MCP posted

[badboy]

Closed by #87760