Make the id field on ServerMessage::Error optional - as it can be ret… (copy #8181) (backport #8189)

[mergify]

This PR FIXES #6138. It brings @jeffutter's #8181 into a context where CI will run and lets me (@abernix) finish the changeset for it.

The websocket-transport-ws spec does not require an id on a CONNECTION_ERROR. This makes that field optional

Todo

• Changeset
• Backport and ship as 2.6.1
• CLA check (@abernix signed off)

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Checklist

Complete the checklist (and note appropriate exceptions) before the PR is marked ready-for-review.

• PR description explains the motivation for the change and relevant context for reviewing
• PR description links appropriate GitHub/Jira tickets (creating when necessary)
• Changes are compatible[^1]
• Performance impact assessed and acceptable
• Tests added and passing[^4]
  • Unit tests
  • Integration tests
  • Manual tests, as necessary

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This is an automatic copy of pull request #8181 done by [Mergify](https://mergify.com).

[ROUTER-1421]: https://apollographql.atlassian.net/browse/ROUTER-1421?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

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This is an automatic backport of pull request #8189 done by Mergify.

[apollo-cla]

@mergify[bot]: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Apollo Contributor License Agreement here: https://contribute.apollographql.com/

[apollo-librarian]

✅ Docs preview ready

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File Changes

0 new, 11 changed, 0 removed

* graphos/routing/(latest)/cloud/migrate-to-dedicated.mdx
* graphos/routing/(latest)/configuration/envvars.mdx
* graphos/routing/(latest)/configuration/cli.mdx
* graphos/routing/(latest)/configuration/yaml.mdx
* graphos/routing/(latest)/customization/custom-binary.mdx
* graphos/routing/(latest)/customization/overview.mdx
* graphos/routing/(latest)/observability/telemetry/instrumentation/selectors.mdx
* graphos/routing/(latest)/operations/file-upload.mdx
* graphos/routing/(latest)/security/persisted-queries.mdx
* graphos/routing/(latest)/security/request-limits.mdx
* graphos/routing/(latest)/graphos-features.mdx

Build ID: eb041c17d7ed21823654cb0d
Build Logs: View logs

URL: https://www.apollographql.com/docs/deploy-preview/eb041c17d7ed21823654cb0d