Auto merge of #112386 - loongarch-rs:reloc-static, r=eholk

loongarch64-unknown-none*: Set default relocation model to static

This PR sets the default relocation model to `static` for `loongarch64-unknown-none*` targets. This change aims to streamline the development of the bare-metal project by removing the need for the executable program loader to implement relocation.

Author: bors