use new CargoCmd from spirv-builder to handle env vars centrally

Author: Firestar99

Cargo.lock

@@ -13,7 +13,7 @@ exclude = [
 resolver = "2"
 
 [workspace.dependencies]
-spirv-builder = { git = "https://github.com/Rust-GPU/rust-gpu", rev = "a029b6e3ff4fcb42347fe25da21a3c8dce2f1bda", default-features = false }
+spirv-builder = { git = "https://github.com/Rust-GPU/rust-gpu", rev = "de5a583abc748fa617b2b0b3065b2b85987da8ec", default-features = false }
 anyhow = "1.0.94"
 clap = { version = "4.5.37", features = ["derive"] }
 crossterm = "0.28.1"