Upstream status for rustc aarch64-unknown-optee-trustzone target?

I observe that `aarch64-unknown-optee-trustzone` target is maintained here [1]. Are there any plans to make it an official target upstream? I do see another target: `aarch64-unknown-teeos` became officially supported tier 3 target upstream here [2] [3] [4] [5]. Can we re-purpose that target for OP-TEE? Or we need to add another target upstream?

[1] https://github.com/mesalock-linux/rust/commits/teaclave-trustzone-sdk-1.56.1
[2] https://github.com/rust-lang/rust/blob/master/src/doc/rustc/src/platform-support/aarch64-unknown-teeos.md
[3] https://github.com/rust-lang/rust/pull/113480
[4] https://github.com/rust-lang/libc/pull/3333
[5] https://github.com/rust-lang/rust/pull/116565

Start with rustc's src/doc/rustc/src/platform-support/aarch64-unknown-teeos.md and review the linked rustc and libc pull requests. Compare that upstream target with the maintained aarch64-unknown-optee-trustzone branch, then determine whether repurposing the existing target or proposing a new one is appropriate. Done means an agreed upstream path is documented.

Written by the indexing model from the issue text.