Auto merge of #57862 - hsivonen:buildneon, r=alexcrichton
Auto merge of #57862 - hsivonen:buildneon, r=alexcrichton

Build the standard library for thumbv7neon-unknown-linux-gnueabihf in CI

Using the `dist-armv7-linux` image instead of `dist-various-1` in order to use the ARMv7 toolchain available in `dist-armv7-linux`.

Closes #57030.

graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust