[chore] add multi platform build support

[puckpuck]

Changes

Adds 4 new make targets to support building multiplatform images (arm64 & amd64): create-multiplatform-builder, removed-multiplatform-builders, build-multiplatform, and build-multiplatform-and-push.

Dockerfile for nearly all services were updated to correct for warnings emitted by buildx, and to add appropriate build logic for multiple platforms.

Merge Requirements

For new features contributions, please make sure you have completed the following
essential items:

• CHANGELOG.md updated to document new feature additions
• Appropriate documentation updates in the docs
• Appropriate Helm chart updates in the helm-charts

Maintainers will not merge until the above have been completed. If you're unsure
which docs need to be changed ping the
@open-telemetry/demo-approvers.

[julianocosta89]

Hey @puckpuck the build builds now, but when I run make start with those images, the currency service is unreachable.
I ran the PR with a pruned system.

Then, after building and the failures in the currency service, I've pruned again and built from main.
Everything worked fine.

Not sure if we need to specify anything else on the make start when the images are built with the buildx, but as of it is not, it is sadly not working :/

[puckpuck]

@julianocosta89 The currency service had an issue in the Dockerfile. I pushed a fix for it.

I started from a clean and pruned system and did the following:

make create-multiplatform-builder
make build-muiltiplatform
make start

All services started as expected, and I verified the traces in Jaeger.

[julianocosta89]

Awesome!
Thanks for patience @puckpuck!

Left a minor suggestion, but it looks good to me 🚀