chore[gpu]: error out in case of mixed cpu/gpu execution #30202

Job	Run time
Python (test)	2m 26s
lint-toml	6s
Rust (lint)	2m 38s
Python (lint)	39s
validate-workflow-yaml	6s
Rust build (wasm32 with default features)	50s
Rust build (with tokio dispatcher)	1m 3s
Rust build (all-features)	1m 58s
Rust build (default features)	1m 59s
C API test build	37s
C++ build	1m 2s
Rust (lint, no default)	1m 45s
Rust tests (windows-x64)	8m 45s
Rust (docs)	2m 47s
Rust tests (linux-arm64)	4m 6s
WASM integration smoke test	2m 3s
License Check and Audit Check (advisories)	51s
SQL logic tests	1m 46s
Check build with minimal dependencies	1m 31s
License Check and Audit Check (bans licenses sources)	52s
Public API lock files	1m 4s
Java	2m 12s
Check generated source files are up to date	44s
C/C++ (lint)	7s
	41m 57s

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