Add 7 new difftests and push constants support #696

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	7m 57s
Test (ubuntu-24.04)	8m 17s
Test (windows-2022)	14m 30s
Test (macOS-latest)	7m 16s
Compiletest (ubuntu-24.04)	8m 26s
Difftest (ubuntu-24.04)	11m 54s
Compiletest (macOS-latest)	10m 25s
Compiletest (windows-2022)	16m 7s
Difftest (macOS-latest)	14m 2s
Difftest (windows-2022)	18m 44s
cargo-deny	1m 10s
Lint	6m 37s
test_success	2s
	2h 5m 27s

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