Auto merge of rust-lang#105893 - Ayush1325:remote-test-server-improve, r=Mark-Simulacrum

Use u32 methods instead of manual shifting

Switch to `to_le_bytes()` and `from_le_bytes()` instead of manual shifting

This was suggested [`here`](rust-lang#105145 (comment))

Signed-off-by: Ayush Singh <[email protected]>

Author: bors