[compiler-v2] Optimize stackless-bytecode assign instructions #71444

Job	Run time
file_change_determinator	14s
rust-consensus-only-smoke-test	0s
rust-consensus-only-unit-test	0s
rust-doc-tests	5m 11s
rust-unit-tests	0s
rust-build-cached-packages	1m 59s
rust-check-merge-base	1m 24s
general-lints	29s
rust-cargo-deny	1m 55s
rust-cryptohasher-domain-separation-check	0s
rust-lints	3m 37s
rust-smoke-tests	46m 14s
rust-targeted-unit-tests	19m 13s
	1h 20m 16s

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