Add 7 new difftests and push constants support #626

Job	Run time
Android (ubuntu-24.04, aarch64-linux-android)	8m 3s
Test (ubuntu-24.04)	24s
Difftest (ubuntu-24.04)	30s
Test (macOS-latest)	15s
Lint	6m 11s
Difftest (macOS-latest)	23s
Test (windows-2022)	10s
Difftest (windows-2022)	13s
cargo-deny	56s
Compiletest (macOS-latest)	12s
Compiletest (ubuntu-24.04)	23s
Compiletest (windows-2022)	9s
test_success	2s
	17m 51s

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