Add 7 new difftests and push constants support #604

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	1m 11s
Test (ubuntu-24.04)	57s
Test (macOS-latest)	1m 3s
Test (windows-2022)	1m 3s
Lint	58s
Compiletest (ubuntu-24.04)	1m 12s
Difftest (windows-2022)	1m 5s
Compiletest (macOS-latest)	1m 4s
Difftest (ubuntu-24.04)	1m 8s
Compiletest (windows-2022)	1m 4s
cargo-deny	1m 9s
Difftest (macOS-latest)	1m 10s
test_success	4s
	13m 8s

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