Support experimental schema types in codegen #163

Job	Run time
Rust SDK Bundled CLI Build (macos-latest)	4m 42s
Rust SDK Tests (ubuntu-latest)	47s
Rust SDK Bundled CLI Build (windows-latest)	3m 22s
Rust SDK Tests (windows-latest)	13m 12s
Rust SDK Bundled CLI Build (ubuntu-latest)	3m 37s
Rust SDK Tests (macos-latest)	6m 43s
	32m 23s

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