Support dual source blending #7722

Job	Run time
Test Windows x86_64	11m 50s
Test WebAssembly	6m 17s
Doctest	52s
Test Mac aarch64	14s
Test Linux x86_64	6m 12s
Clippy Windows x86_64	3m 24s
Clippy MacOS x86_64	1m 17s
Run `cargo deny check advisories`	4m 43s
Run `cargo deny check`	5m 17s
Clippy MacOS aarch64	2m 16s
Clippy IOS aarch64	1m 6s
Clippy cts_runner	52s
Clippy Linux x86_64	1m 46s
Format	19s
Clippy Linux aarch64	2m 1s
Clippy Android aarch64	1m 37s
Clippy WebAssembly	2m 2s
Clippy Emscripten	53s
	52m 58s

Provide feedback