Rust

Merge pull request #1190 from stellar/release/v20.3.0 #4480

Job	Run time
fmt	9s
build-and-test (msrv)	12m 57s
rust-analyzer-compat	3m 37s
build-and-test (latest)	11m 26s
publish-dry-run (macos-latest, x86_64-apple-darwin, --feature-powerset) / publish-dry-run	38m 23s
publish-dry-run (macos-latest, aarch64-apple-darwin, --feature-powerset) / publish-dry-run	31m 45s
publish-dry-run (ubuntu-latest, aarch64-unknown-linux-gnu, --feature-powerset) / publish-dry-run	24m 54s
publish-dry-run (ubuntu-latest, x86_64-unknown-linux-gnu, --feature-powerset) / publish-dry-run	22m 2s
publish-dry-run (windows-latest-8-cores, x86_64-pc-windows-msvc, --features opt --ignore-unknown-... / publish-dry-run	12m 57s
publish-dry-run (windows-latest-8-cores, x86_64-pc-windows-msvc) / publish-dry-run	9m 50s
complete	1s
	2h 48m 1s

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