Add 7 new difftests and push constants support #699

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	7m 47s
Test (ubuntu-24.04)	8m 0s
Compiletest (windows-2022)	16m 31s
Compiletest (ubuntu-24.04)	8m 19s
Test (windows-2022)	14m 43s
Difftest (macOS-latest)	14m 29s
Lint	1m 9s
Test (macOS-latest)	6m 45s
Difftest (windows-2022)	22m 40s
Difftest (ubuntu-24.04)	11m 33s
cargo-deny	1m 18s
Compiletest (macOS-latest)	8m 45s
test_success	2s
	2h 2m 1s

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