docs: move context callout (backport #7104)

[Meschreiber]

Move information about how to access operation ID when writing custom plugins from https://www.apollographql.com/docs/graphos/routing/graphos-reporting#errors

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This is an automatic backport of pull request #7104 done by Mergify.

[mergify]

Cherry-pick of 2f6552d has failed:

On branch mergify/bp/1.x/pr-7104
Your branch is up to date with 'origin/1.x'.

You are currently cherry-picking commit 2f6552de.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   docs/source/routing/customization/native-plugins.mdx
	both modified:   docs/source/routing/graphos-reporting.mdx

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[svc-apollo-docs]

❌ Docs preview failed

The preview failed to build.

Build ID: d9e7a040937478d8fd9e868a

Errors

graphos/routing/v1/customization/native-plugins

• Unexpected character < (U+003C) before name, expected a character that can start a name, such as a letter, $, or _
  graphos/routing/v1/graphos-reporting

• Unexpected character < (U+003C) before name, expected a character that can start a name, such as a letter, $, or _