Add 7 new difftests and push constants support #609

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	51s
Test (ubuntu-24.04)	51s
Compiletest (windows-2022)	1m 4s
Compiletest (ubuntu-24.04)	54s
Test (macOS-latest)	1m 11s
cargo-deny	1m 5s
Lint	57s
Difftest (windows-2022)	56s
Difftest (ubuntu-24.04)	1m 9s
Test (windows-2022)	55s
Compiletest (macOS-latest)	1m 4s
Difftest (macOS-latest)	1m 3s
test_success	2s
	12m 2s

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