core: Use proper sandbox type per SWF #25532

Job	Run time
Paths filter	8s
Check dependencies	1m 25s
Test Rust stable / ubuntu-24.04	4m 43s
Lints with Rust stable	4m 25s
Lints with Rust beta	4m 30s
Test Rust stable / windows-latest	12m 26s
Test Rust ${{ matrix.rust_version }} / ${{ matrix.os }}	0s
Lints with Rust nightly	4m 19s
Test Rust stable / macos-14	3m 13s
Test Rust nightly / ubuntu-24.04	8m 31s
Test Rust beta / ubuntu-24.04	4m 42s
	48m 22s

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