Add Arm64 Windows CI jobs

[dpaoliello]

The aarch64-pc-windows-msvc target is on the path to being promoted to Tier 1: rust-lang/rfcs#3817

Adding Arm64 Windows runners will catch any potential issues in Cargo before changes are merged in, instead of waiting for the Cargo submodule to be updated.

[rustbot]

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[weihanglo]

Blocked on waiting for RFC being merged, but thanks anyway!

[Noratrieb]

The RFC has been merged 🎉

[weihanglo]

Thanks!

[dpaoliello]

Looks like build-std is currently broken? (Note that this is failing for x64 Linux, the new Arm64EC job passed):

    Blocking waiting for file lock on package cache
   Compiling compiler_builtins v0.1.160 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/compiler-builtins/compiler-builtins)
   Compiling core v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
   Compiling libc v0.2.174
   Compiling std v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std)
   Compiling rustc-std-workspace-core v1.99.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
   Compiling alloc v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc)
   Compiling cfg-if v1.0.1
   Compiling panic_abort v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/panic_abort)
   Compiling rustc-demangle v0.1.26
   Compiling unwind v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/unwind)
   Compiling rustc-std-workspace-alloc v1.99.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-alloc)
   Compiling std_detect v0.1.5 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std_detect)
   Compiling panic_unwind v0.0.0 (/home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/panic_unwind)
   Compiling hashbrown v0.15.5
error[E0152]: duplicate lang item in crate `core`: `sized`
  |
  = note: the lang item is first defined in crate `core` (which `std_detect` depends on)
  = note: first definition in `core` loaded from /home/runner/work/cargo/cargo/target/tmp/cit/t5/foo/target/debug/deps/libcore-2803056b1614b182.rmeta
  = note: second definition in `core` loaded from /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-28a6d102916cede1.rlib

For more information about this error, try `rustc --explain E0152`.
error: could not compile `std_detect` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...

note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    test_panic_abort

[weihanglo]

See https://rust-lang.zulipchat.com/#narrow/channel/246057-t-cargo/topic/.60build-std.60.20test.20failure/with/535198413 and rust-lang/rust#145619. Will be fixed tomorrow when new nightly is out I believe.