Internalize env_value_mode (cross-SDK parity) #81

Job	Run time
Rust SDK Bundled CLI Build (ubuntu-latest)	3m 41s
Rust SDK Bundled CLI Build (windows-latest)	2m 59s
Rust SDK Tests (macos-latest)	1m 29s
Rust SDK Tests (ubuntu-latest)	2m 13s
Rust SDK Bundled CLI Build (macos-latest)	4m 50s
Rust SDK Tests (windows-latest)	2m 31s
	17m 43s

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