Revert "go GA with @segment/analytics-node (#4675)" (#4695)

This reverts commit e7e06de.

Author: markzegarelli

src/connections/sources/catalog/libraries/server/node/classic.md

@@ -5,8 +5,8 @@ strat: node-js
 hidden: false
 ---
 
-> info "Upgrade to the new Analytics Node.js package"
-> This is the docs for the legacy npm package (`analytics-node`). Please [upgrade to](/docs/connections/sources/catalog/libraries/server/node/migration/) the new package (`@segment/analytics-node`). See the updated [Analytics Node.js docs](/docs/connections/sources/catalog/libraries/server/node) to learn more.
+> info "Upgrade to the new version of Analytics Node.js"
+> There's a new version of Analytics Node.js. [Upgrade](/docs/connections/sources/catalog/libraries/server/node/migration/) to the latest version. See the updated [Analytics Node.js docs](/docs/connections/sources/catalog/libraries/server/node) to learn more.
 
 Segment's Node.js library lets you record analytics data from your node code. The requests hit Segment's servers, and then Segment routes your data to any destinations you have enabled.
 

src/connections/sources/catalog/libraries/server/node/index.md

@@ -5,6 +5,9 @@ repo: analytics-next
 strat: node-js
 ---
 
+> info ""
+> This version of Analytics for Node.js is in beta and Segment is actively working on this feature. Segment's [First-Access and Beta terms](https://segment.com/legal/first-access-beta-preview/) govern this feature. If you’re using the classic version of Analytics for Node.js, you can refer to the documentation [here](/docs/connections/sources/catalog/libraries/server/node/classic).
+
 Segment's Analytics Node.js library lets you record analytics data from your node code. The requests hit Segment's servers, and then Segment routes your data to any destinations you have enabled.
 
 The [Segment Analytics Node.js Next library is open-source](https://github.com/segmentio/analytics-next/tree/master/packages/node){:target="_blank"} on GitHub.

src/connections/sources/catalog/libraries/server/node/migration.md

@@ -4,7 +4,10 @@ repo: analytics-next
 strat: node-js
 ---
 
-If you're using the [classic version of Analytics Node.js](/docs/connections/sources/catalog/libraries/server/node/classic) (named `analytics-node` on npm), follow these steps to upgrade to the [latest version of Analytics Node.js](/connections/sources/catalog/libraries/server/node/) (named `@segment/analytics-node` on npm). 
+> info ""
+> This version of Analytics for Node.js is in beta and Segment is actively working on this feature. Segment's [First-Access and Beta terms](https://segment.com/legal/first-access-beta-preview/) govern this feature. 
+
+If you're using the [classic version of Analytics Node.js](/docs/connections/sources/catalog/libraries/server/node/classic), follow these steps to upgrade to the [latest version of Analytics Node.js](/connections/sources/catalog/libraries/server/node/). 
 
 1. Change the named imports.