ci: resolve target tuple from rustc #499

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	8m 17s
Compiletest (ubuntu-24.04)	1m 44s
Compiletest (macOS-latest)	1m 47s
Test (macOS-latest)	1m 37s
Test (ubuntu-24.04)	1m 54s
Test (windows-2022)	1m 15s
cargo-deny	51s
Difftest (macOS-latest)	1m 6s
Difftest (ubuntu-24.04)	1m 13s
Difftest (windows-2022)	55s
Compiletest (windows-2022)	1m 22s
Lint	5m 52s
test_success	0s
	27m 53s

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