ci: build platform ruby_wasm gems for Ruby 4.0 #752

Job	Run time
ci-data	6s
Push source gem	-1s
Compile native gem for x64-mingw-ucrt	7s
Compile native gem for aarch64-linux	6s
Compile native gem for aarch64-linux-musl	8s
Compile native gem for x86_64-darwin	8s
Compile native gem for x86_64-linux-musl	7s
Compile native gem for arm64-darwin	7s
Compile native gem for x86_64-linux	7s
	55s

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