refactor: make TaskEnvs::resolve accept env iterator parameter #61

Job	Run time
Lint	1m 27s
Test (windows-latest, x86_64-pc-windows-msvc)	3m 28s
Test (namespace-profile-mac-default, aarch64-apple-darwin)	38s
Test (ubuntu-latest, x86_64-unknown-linux-gnu)	1m 48s
done	3s
	7m 24s

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