Move `update_environment` from `run` to the `project` namespace #6507

Job	Run time
cargo clippy \| windows	1m 4s
cargo fmt	19s
cargo shear	30s
cargo clippy \| ubuntu	51s
cargo test \| ubuntu	3m 58s
cargo test \| windows	5m 19s
cargo test \| macos	4m 14s
Determine changes	8s
check windows trampoline	2m 34s
build binary \| linux	1m 28s
build binary \| macos aarch64	1m 11s
build binary \| macos x86_64	1m 46s
build binary \| windows	1m 53s
benchmarks	2m 5s
check system \| homebrew python on macos aarch64	17s
check cache \| macos aarch64	14s
check system \| python on macos aarch64	15s
check system \| python on macos x86_64	21s
check system \| python on fedora	30s
ecosystem test \| prefecthq/prefect	1m 54s
ecosystem test \| pallets/flask	10s
check system \| python on debian	39s
check cache \| ubuntu	48s
check system \| python on opensuse	38s
check system \| python on ubuntu	15s
check system \| alpine	25s
check system \| amazonlinux	26s
check system \| python via pyenv	1m 41s
check system \| pypy on ubuntu	25s
check system \| pyston	3m 51s
check system \| python on rocky linux 8	29s
check system \| python on rocky linux 9	24s
check system \| python3.12 via chocolatey	1m 0s
check system \| python3.10 on windows	49s
check system \| embedded python3.10 on windows	32s
check system \| conda3.8 on linux	1m 3s
check system \| conda3.11 on linux	36s
check system \| python3.13 on windows	1m 15s
check system \| conda3.8 on windows	1m 56s
check system \| python3.10 on windows x86	47s
check system \| conda3.11 on windows	2m 7s
check system \| conda3.8 on macos	41s
check system \| conda3.11 on macos	42s
	52m 30s

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