1.5 Feature deprecations for target and logs

[matthewshaver]

What are you changing in this pull request and why?

We are deprecating two flags that can be set in the dbt project yml file. They will still have two other options to implement, and 1.5 supports backward compatibility, but users will need to migrate off the feature before a future version disables it entirely.

Checklist

• Review the Content style guide and About versioning so my content adheres to these guidelines.
• Add a checklist item for anything that needs to happen before this PR is merged, such as "needs technical review" or "change base branch."

Adding new pages (delete if not applicable):

• Add page to website/sidebars.js
• Provide a unique filename for the new page

Removing or renaming existing pages (delete if not applicable):

• Remove page from website/sidebars.js
• Add an entry _redirects
• Ran link testing to update the links that point to the deleted page

[netlify]

✅ Deploy Preview for docs-getdbt-com ready!

Name	Link
🔨 Latest commit	050164e
🔍 Latest deploy log	https://app.netlify.com/sites/docs-getdbt-com/deploys/642b4af2622ead0009deb6ed
😎 Deploy Preview	https://deploy-preview-3129--docs-getdbt-com.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[runleonarun]

This looks good in the output!

[runleonarun]

I didn't realize we could nest these version blocks!