Update Rust crate vergen to v9 #642

Job	Run time
Clippy	8s
Generate full example app	9s
Generate minimal example app	10s
Generate default example app	7s
Rust Format	9s
Test	8s
Build docs for generated default example app	0s
Test generated default example app	0s
Run Clippy on generated default example app	0s
Validate format of generated default example app	0s
Validate format of generated full example app	0s
Run generated default example app	0s
Run generators on generated default example app	0s
Test generated full example app	0s
Run Clippy on generated full example app	0s
Run generated full example app	0s
Build docs for generated full example app	0s
Test generated minimal example app	0s
Validate format of generated minimal example app	0s
Run Clippy on generated minimal example app	0s
Build docs for generated minimal example app	0s
Run generated minimal example app	0s
	51s

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