chore: fix documentation generation action in CI

[baileympearson]

Description

Summary of Changes

The release action was failing because create-pull-request was running in a separate stage from the docs generation and was not checking out the repo. Adding a checkout step does not fix the issue, because any docs changes made by the previous stage are not present in the newly cloned repo.

I resolve this issue by making the documentation build action a composite action instead, which can be called inside the same stage as create-pull-request.

Example release PR generated from the action: #4682

Notes for Reviewers

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Release Highlight

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Double check the following

• Lint is passing (npm run check:lint)
• Self-review completed using the steps outlined here
• PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• Changes are covered by tests
• New TODOs have a related JIRA ticket