Add in-process FFI transport for Rust SDK (#1915) #1698

Job	Run time
Rust SDK Tests (macos-latest, inprocess)	11m 14s
Rust SDK Tests (ubuntu-latest, inprocess)	13m 1s
Rust SDK Bundled CLI Build (ubuntu-latest)	3m 28s
Rust SDK Bundled CLI Build (macos-latest)	3m 27s
Rust SDK Tests (macos-latest, default)	8m 23s
Rust SDK Tests (windows-latest, default)	13m 35s
Rust SDK Bundled CLI Build (windows-latest)	4m 57s
Rust SDK Tests (ubuntu-latest, default)	9m 48s
	1h 7m 53s

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