Add 7 new difftests and push constants support #624

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	8m 29s
Test (ubuntu-24.04)	8m 26s
Compiletest (windows-2022)	15m 54s
Test (windows-2022)	15m 28s
Compiletest (macOS-latest)	8m 38s
Test (macOS-latest)	11m 27s
Lint	1m 5s
Difftest (ubuntu-24.04)	10m 15s
Compiletest (ubuntu-24.04)	8m 23s
Difftest (windows-2022)	10m 10s
Difftest (macOS-latest)	9m 57s
cargo-deny	1m 4s
test_success	4s
	1h 49m 20s

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