Rollup merge of #146034 - taiki-e:target-spec, r=nnethercote

Update target spec metadata of Arm64EC Windows and Trusty targets

Update outdated target spec metadata in the following targets.

- Arm64EC Windows (`arm64ec-pc-windows-msvc`) is "tier 2 without host tools" since rust-lang/rust#126039 and supports `std`  since before that, but metadata currently says that is tier 3 and has unknown `std` support status.
- Trusty targets (`{aarch64,armv7,x86_64}-unknown-trusty`) support `std` since rust-lang/rust#136842 (and I confirmed they can be compiled with `-Zbuild-std=std`), but metadata currently says that has no `std` support.

Mentioning `@dpaoliello` as [arm64ec-pc-windows-msvc target-maintainer](https://doc.rust-lang.org/nightly/rustc/platform-support/arm64ec-pc-windows-msvc.html#target-maintainers).
Mentioning `@randomPoison` `@ahomescu` as [Trusty target maintainers](https://doc.rust-lang.org/nightly/rustc/platform-support/trusty.html#target-maintainers).

Author: GuillaumeGomez