Enable multi architecture compatibility between Tentacle and Script pods

[octonautcal]

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Background

The boostrapRunner executable is a Go binary that is built as part of the Tentacle image, and copied over to the script pod at runtime. It is used to wrap the script execution so the pod streams logs in a format that Tentacle can parse. It is not built as part of the worker-tools image because customers are free to specify their own worker-tools image, and we need to ensure the logs are in the correct format.

Problem

The current bootstrapRunner exe is tightly coupled with the architecture of the Tentacle container. The limitation exists because we only build the bootstrapRunner exe for the arch that the tentacle image is built on.

RUN go build -ldflags "-s -w" -o "bin/bootstrapRunner"

This becomes a problem when the Tentacle and script pods are running on different platform architectures - i.e. when the script pod is spun up on a different node. In such a scenario the script pod would receive a bootstrapRunner exe that it cannot execute.

Results

Testing strategy

1. Set up a multi arch node AKS here

2. Create a worker on https://team-md-argocd-in-octopus.testoctopus.app/app#/Spaces-263/infrastructure/workers/Workers-81/settings.

3. Test that it normally fails due to incorrect arch

4. Deployed a multiarch image(containing our fixes) to an Azure Container Registry linked it to the Team MD sandbox cluster.

5. Set updated image to be updated in the helm release

6. Test that it now correctly works regardless of architecture

How to review this PR

Quality ✔️

Pre-requisites

• I have read How we use GitHub Issues for help deciding when and where it's appropriate to make an issue.
• I have considered informing or consulting the right people, according to the ownership map.
• I have considered appropriate testing for my change.

[rain-on]

LGTM

[APErebus]

Non-blocking minor things