chore: Fix compilation of benchmarks if gpu_unstable is not enabled #19903

Job	Run time
lint-toml	8s
validate-workflow-yaml	5s
Python (lint)	4m 50s
Check build with minimal dependencies	2m 10s
Rust tests (sanitizer)	5m 33s
Rust tests (coverage) (tests)	9m 33s
Rust tests (coverage) (tpc-h)	8m 37s
Rust tests (coverage) (ffi)	4m 13s
Rust (docs)	2m 36s
GPU tests	2m 20s
Rust (lint)	2m 7s
Rust (lint, no default)	3m 59s
Benchmark with Codspeed (Shard #2)	3m 17s
License Check and Audit Check (advisories)	51s
Benchmark with Codspeed (Shard #1)	7m 3s
Python (test)	5m 58s
Java	6m 27s
Rust build (all-features)	3m 10s
Rust build (with tokio dispatcher)	3m 9s
License Check and Audit Check (bans licenses sources)	51s
Rust build (wasm32 with default features)	1m 48s
Rust build (default features)	2m 58s
Rust tests (miri)	3m 42s
wasm-integration	3m 21s
C++ build	4m 53s
Check generated source files are up to date	3m 24s
	1h 37m 3s

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