Add opaque `metadata` passthrough to SDK tool definitions #1743

Job	Run time
Rust SDK Tests (ubuntu-latest, inprocess)	12m 58s
Rust SDK Tests (macos-latest, default)	6m 37s
Rust SDK Tests (windows-latest, default)	11m 49s
Rust SDK Tests (macos-latest, inprocess)	10m 22s
Rust SDK Bundled CLI Build (macos-latest)	3m 25s
Rust SDK Bundled CLI Build (windows-latest)	4m 13s
Rust SDK Bundled CLI Build (ubuntu-latest)	3m 10s
Rust SDK Tests (ubuntu-latest, default)	9m 51s
	1h 2m 25s

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