Use environment layering for `uv run --with` #6017

Job	Run time
cargo clippy \| ubuntu	53s
cargo clippy \| windows	3m 42s
cargo fmt	22s
cargo test \| windows	5m 0s
cargo test \| ubuntu	4m 30s
cargo test \| macos	5m 21s
Determine changes	5s
build binary \| linux	2m 8s
build binary \| macos aarch64	1m 6s
build binary \| macos x86_64	1m 41s
build binary \| windows	2m 5s
check windows trampoline	4m 28s
benchmarks	2m 35s
check system \| python on macos aarch64	17s
check cache \| macos aarch64	12s
check system \| homebrew python on macos aarch64	19s
check system \| python on macos x86_64	24s
check system \| python3.10 on windows	39s
check system \| python3.12 via chocolatey	1m 30s
check system \| embedded python3.10 on windows	30s
check system \| python3.13 on windows	1m 12s
check system \| python3.10 on windows x86	53s
check system \| python on debian	46s
check cache \| ubuntu	54s
ecosystem test \| prefecthq/prefect	1m 58s
check system \| amazonlinux	34s
check system \| alpine	23s
ecosystem test \| pallets/flask	11s
check system \| conda3.8 on linux	48s
check system \| python on fedora	30s
check system \| python on opensuse	47s
check system \| conda3.11 on linux	38s
check system \| python via pyenv	1m 47s
check system \| conda3.8 on windows	2m 4s
check system \| conda3.11 on windows	2m 22s
check system \| pypy on ubuntu	28s
check system \| pyston	4m 1s
check system \| conda3.8 on macos	46s
check system \| python on rocky linux 8	40s
check system \| conda3.11 on macos	44s
check system \| python on rocky linux 9	24s
check system \| python on ubuntu	17s
	1h 0m 54s

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