Update to CI jobs page

[nghi-ly]

What are you changing in this pull request and why?

Added content to the CI jobs page. This is related to issue #4344 .

Updated sections:

• Prerequisites for Set up CI jobs since both native and non-native Git integrations are now supported in the UI
• Trigger a CI job with the API to include the new non_native_pull_request_id field in step 2 of the procedure

Extra credit work:

• Removed stale info that no longer applies with the support of non-native Git integrations
• Added a removed section back in, per review discussion.

Checklist

• Review the Content style guide so my content adheres to these guidelines.
• For docs versioning, review how to version a whole page and version a block of content.
• Needs review from product team

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Name	Status	Preview	Comments	Updated (UTC)
docs-getdbt-com	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 22, 2024 10:40pm