Improve Devnet Docker image platform handling

[hugocaillard]

Context

The Devnet allows to configure the docker_platform setting, which by default is "linux/amd64".
Meaning that all ARM (including Apple Silicon users) may experience degraded experiences.

Problem

• Some images, such as the official postgres ones, are multi-platform, meaning that if Clarinet wasn't enforcing the platform, Docker would automatically use linux/arm64 image when it would make sense.
• For most of our other images, we don't have other platform versions (only "linux/amd64")

Possible solution

• By default, maybe Clarinet shouldn't have a default platform, so that docker can automatically pick the right image
• We should build multi-platform images for our custom images (bitcoin-node, stacks-node, stacks-api, bitcoin-explorer, stacks-explorer)

Additional context

I heard about some issues while running the Nakamoto image emulated for arm64, it was mentioned during visio calls so I don't have much more context about that