Rust

Add `required` field to generated CLI schema #1766

Job	Run time
check-style	16s
check-generation	1m 28s
build-and-test (ubuntu-22.04, all)	4m 35s
clippy-lint	3m 12s
build-and-test (ubuntu-22.04, default)	4m 39s
build-and-test (windows-2022, all)	6m 54s
build-and-test (windows-2022, default)	6m 50s
build-and-test (macos-12, all)	7m 7s
build-and-test (macos-12, default)	5m 56s
	40m 57s

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