Support dual source blending #7643

Job	Run time
Doctest	6m 10s
Test Windows x86_64	7m 1s
Test Mac aarch64	1m 41s
Test Linux x86_64	10m 27s
Run `cargo deny check advisories`	4m 49s
Clippy Windows x86_64	1m 49s
Clippy MacOS x86_64	4m 34s
Clippy MacOS aarch64	7m 18s
Clippy IOS aarch64	4m 20s
Clippy Linux x86_64	7m 23s
Clippy Linux aarch64	5m 39s
Clippy Android aarch64	6m 25s
Clippy WebAssembly	2m 15s
Clippy Emscripten	4m 45s
Test WebAssembly	4m 55s
Run `cargo deny check`	4m 54s
Clippy cts_runner	4m 12s
Format	17s
	1h 28m 54s

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