Add preview apache pulsar sink changefeed docs v24.1

[katmayb]

Fixes DOC-9664

This PR adds docs for the Apache Pulsar preview sink for v24.1.

• Changefeed sink description
• Short-form example
• List of unsupported options/features
• Added to the preview section of the CockroachDB Feature Availability page.

Follow the links in the Files changed box below for rendered previews.

[github-actions[bot]]

Files changed:

• src/current/_includes/v24.1/cdc/apache-pulsar-unsupported.md:
• src/current/v24.1/cockroachdb-feature-availability.md
• src/current/v24.1/changefeed-sinks.md
• src/current/_includes/v24.1/cdc/apache-pulsar-uri.md:
• src/current/v24.1/create-changefeed.md
• src/current/v24.1/changefeed-sinks.md
• src/current/v24.1/changefeed-examples.md
• src/current/v24.1/changefeed-sinks.md
• src/current/v24.1/cockroachdb-feature-availability.md
• src/current/v24.1/create-changefeed.md

[netlify[bot]]

✅ Deploy Preview for cockroachdb-api-docs canceled.

Name	Link
🔨 Latest commit	562585bc9d68720d24930ffe70210056d3ee3b07
🔍 Latest deploy log	https://app.netlify.com/sites/cockroachdb-api-docs/deploys/666761f05822cb000807a05f

[netlify[bot]]

✅ Deploy Preview for cockroachdb-interactivetutorials-docs canceled.

Name	Link
🔨 Latest commit	562585bc9d68720d24930ffe70210056d3ee3b07
🔍 Latest deploy log	https://app.netlify.com/sites/cockroachdb-interactivetutorials-docs/deploys/666761f0e868c200088514d2

[netlify[bot]]

✅ Netlify Preview

Name	Link
🔨 Latest commit	562585bc9d68720d24930ffe70210056d3ee3b07
🔍 Latest deploy log	https://app.netlify.com/sites/cockroachdb-docs/deploys/666761f09a2ce00008917c69
😎 Deploy Preview	https://deploy-preview-18529--cockroachdb-docs.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 configuration.

[katmayb]

Thank you for putting this together! Only have one comment.

Hey @rharding6373, tftr, I don't see your comment in the PR.