feat: move to arm64 architecture

[samchungy]

Gantry now has support for arm64. We can pretty much move our builds to arm64.

Todo: Bump up gantry version once the hotfix lands.

[changeset-bot]

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Latest commit: fd45c10

The changes in this PR will be included in the next version bump.

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skuba	Minor

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[samchungy]

not sure if FROM --platform=linux/arm64 works here. I'll have to test

[72636c]

One complication with early adoption here is that existing teams will be using Intel build agents. We'd have to figure out how to best communicate that they should provision a Graviton cluster for their new project.

[samchungy]

One complication with early adoption here is that existing teams will be using Intel build agents. We'd have to figure out how to best communicate that they should provision a Graviton cluster for their new project.

yeah I noticed gantry had some sections on this actually

https://gantry.ssod.skinfra.xyz/docs/v1/reference/using-arm.html

[72636c]

One option may be to scrap the queue templating and just inline a bunch of documentation/links/TODOs in our .buildkite/pipeline.yml template files

skuba/template/koa-rest-api/skuba.template.js

Lines 13 to 24 in 034fe46

	{
	name: 'devBuildkiteQueueName',
	message: 'Dev Buildkite queue',
	initial: 'my-team-aws-account-dev:cicd',
	validate: (value) => /^.+:.+$/.test(value),
	},
	{
	name: 'prodBuildkiteQueueName',
	message: 'Prod Buildkite queue',
	initial: 'my-team-aws-account-prod:cicd',
	validate: (value) => /^.+:.+$/.test(value),
	},

[samchungy]

Our buildAgents only support x86 for the GET_GITHUB_TOKEN step for now. Will wait til support is added:

https://seekchat.slack.com/archives/C01J8F3LELB/p1653619527077269?thread_ts=1653617669.275119&cid=C01J8F3LELB