Add 7 new difftests and push constants support #585

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	8m 16s
Test (windows-2022)	16m 29s
cargo-deny	1m 11s
Compiletest (windows-2022)	15m 31s
Test (ubuntu-24.04)	8m 13s
Test (macOS-latest)	12m 35s
Compiletest (macOS-latest)	6m 29s
Lint	1m 1s
Compiletest (ubuntu-24.04)	8m 8s
Difftest (macOS-latest)	10m 43s
Difftest (windows-2022)	12m 22s
Difftest (ubuntu-24.04)	12m 11s
test_success	2s
	1h 53m 11s

Provide feedback