Add 7 new difftests and push constants support #663

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	7m 59s
cargo-deny	1m 12s
Test (ubuntu-24.04)	7m 47s
Test (windows-2022)	15m 20s
Lint	1m 1s
Compiletest (windows-2022)	16m 3s
Difftest (ubuntu-24.04)	12m 3s
Test (macOS-latest)	10m 37s
Compiletest (macOS-latest)	8m 26s
Compiletest (ubuntu-24.04)	8m 24s
Difftest (windows-2022)	23m 20s
Difftest (macOS-latest)	8m 55s
test_success	3s
	2h 1m 10s

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