```CROSS_CONTAINER_OPTS``` does not replace ```--platform linux/amd64```

[leet4tari]

Checklist

• [X] I've looked through the issues and pull requests for similar reports

Describe your issue

I don't think that the CROSS_CONTAINER_OPTS env is replacing the --platform linux/amd64 command, at least not on Apple Silicon.

What target(s) are you cross-compiling for?

aarch64-unknown-linux-gnu, x86_64-unknown-linux-gnu

Which operating system is the host (e.g computer cross is on) running?

• [X] macOS
• [ ] Windows
• [ ] Linux / BSD
• [ ] other OS (specify in description)

What architecture is the host?

• [ ] x86_64 / AMD64
• [ ] arm32
• [X] arm64 (including Mac M1)

What container engine is cross using?

• [X] docker
• [ ] podman
• [ ] other container engine (specify in description)

cross version

cross 0.2.5 (19be834 2024-05-17)

Example

Running

export CROSS_CONTAINER_OPTS="--platform linux/arm64"
export CROSS_BUILD_OPTS="--platform linux/arm64"
export CROSS_DEBUG=1

then trying run

cross build \
  --target aarch64-unknown-linux-gnu \
  --bin minotari_miner -v
[src/cargo.rs:156] ->
+ cargo metadata --format-version 1 --filter-platform aarch64-unknown-linux-gnu
[src/rustc.rs:370] ->
+ rustc --print sysroot
[src/docker/engine.rs:220] ->
+ /usr/local/bin/docker
[src/docker/engine.rs:295] ->
+ /usr/local/bin/docker version -f '{{ .Server.Os }},,,{{ .Server.Arch }}'
[src/docker/engine.rs:163] ->
+ /usr/local/bin/docker info -f {{.SecurityOptions}}
[src/rustup.rs:89] ->
+ rustup toolchain list
[src/rustup.rs:115] ->
+ rustup target list --toolchain nightly-2024-03-01-x86_64-unknown-linux-gnu
[src/rustup.rs:242] ->
+ rustup component list --toolchain nightly-2024-03-01-x86_64-unknown-linux-gnu
[src/docker/custom.rs:177] ->
+ /usr/local/bin/docker buildx build --platform linux/amd64 --progress auto --label 'org.cross-rs.for-cross-target=aarch64-unknown-linux-gnu' --label 'org.cross-rs.runs-with=x86_64-unknown-linux-gnu' --label 'org.cross-rs.workspace_root=/Users/leet/src/tari/tari-projects/tari' --tag localhost/cross-rs/cross-custom-tari:aarch64-unknown-linux-gnu-6c732-pre-build --build-arg 'CROSS_SCRIPT=./scripts/cross_compile_hack.sh' --build-arg 'CROSS_TARGET=aarch64-unknown-linux-gnu' --build-arg 'CROSS_DEB_ARCH=arm64' --file /Users/leet/src/tari/tari-projects/tari/target/aarch64-unknown-linux-gnu/Dockerfile.aarch64-unknown-linux-gnu-custom --platform linux/arm64 --output 'type=docker' /Users/leet/src/tari/tari-projects/tari

You might notice docker buildx build --platform linux/amd64 with --platform linux/arm64 much later in the command, which I think force running x86 images, even thou I would like to use an aarch64/arm64 image.

Reason been, that I was looking to run a CPU native docker image as my base to cross-compile, I was expecting/hoping to use aarch64-unknown-linux-gnu image (Ubuntu 18.04), but kept running into rosetta errors.

Additional information / notes

No response