Containers fixups

[penalosa]

Fixes https://jira.cfdata.org/browse/DEVX-1988 & https://jira.cfdata.org/browse/DEVX-1999

• Rename the env var for customising the docker bin location to WRANGLER_DOCKER_BIN
• Add a warning banner to all containers & cloudchamber commands

---

• Tests
  • TODO (before merge)
  • Tests included
  • Tests not necessary because: should pass existing tests
• Wrangler / Vite E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • I don't know
  • Required
  • Not required because:
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Documentation not necessary because: still pre-release
• Wrangler V3 Backport
  • TODO (before merge)
  • Wrangler PR:
  • Not necessary because: v4-only fature

[changeset-bot]

🦋 Changeset detected

Latest commit: 85ff6fc

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

This PR includes changesets to release 3 packages

Name	Type
@cloudflare/containers-shared	Patch
wrangler	Patch
@cloudflare/vitest-pool-workers	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@9653

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@9653

miniflare

npm i https://pkg.pr.new/miniflare@9653

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@9653

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@9653

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@9653

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@9653

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@9653

wrangler

npm i https://pkg.pr.new/wrangler@9653

commit: 85ff6fc

[github-actions]

Failed to automatically backport this PR's changes to Wrangler v3. Please manually create a PR targeting the v3-maintenance branch with your changes. Thank you for helping us keep Wrangler v3 supported!

Depending on your changes, running git rebase --onto v3-maintenance main penalosa/containers might be a good starting point.

Notes:

• your PR branch should be named v3-backport-9653
• add the skip-v3-pr label to the current PR to stop this workflow from failing

[petebacondarwin]

I'm pretty sure this string can be computed from the command config rather than duplicating it here.