Upgrade Rust `1.73.0` #4366

Job	Run time
build-ubuntu-X64	4m 52s
build (macos-12)	2m 29s
build (windows-latest)	4m 21s
check	1m 19s
test (ubuntu-22.04)	6m 18s
test (macos-12)	1m 25s
test (windows-latest)	3m 13s
run-test-lab (thales, 1)	2m 4s
run-test-lab (thales, 2)	1m 51s
run-test-lab (thales, 3)	1m 41s
publish-tests-results	15s
docker-mithril (mithril-aggregator)	27s
docker-mithril (mithril-client)	19s
docker-mithril (mithril-signer)	26s
unstable-release	0s
deploy-testing (testing-preview)	29s
	31m 29s

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