feat: Move vercel log drains to EA (#15450)

Move vercel log drains to EA.

Author: AbhiPrasad

docs/organization/early-adopter-features/index.mdx

@@ -24,3 +24,4 @@ Limitations:
 - [Dynamic Alerts](/product/alerts/create-alerts/metric-alert-config/#dynamic-alerts)
 - [New Trace Explorer With Span Metrics](/product/explore/new-trace-explorer/)
 - [Size Analysis](/product/size-analysis/)
+- [Vercel Log Drains](/product/drains/integration/vercel/)

docs/product/drains/integration/vercel.mdx

@@ -27,7 +27,7 @@ To set up a Drain in Vercel you'll need to create a new Drain in the Vercel sett
 
 <Alert>
 
-Vercel Log Drains support is currently in closed alpha. Please reach out to [[email protected]](mailto:[email protected]) if you have feedback or questions. Features in alpha are still in-progress and may have bugs. We recognize the irony.
+This feature is available only if you're in the <a href="/organization/early-adopter-features/" target="_blank">Early Adopter program</a>. Please reach out to [[email protected]](mailto:[email protected]) if you have feedback or questions. Features available to Early Adopters are still in-progress and may have bugs. We recognize the irony.
 
 </Alert>
 
@@ -59,6 +59,12 @@ x-sentry-auth: sentry sentry_key=___PUBLIC_KEY___
 
 7. To test that the log drain is working, you can send a test log to your drain by clicking the Test button.
 
+<Alert level="warning">
+
+Vercel Log Drains have some known limitations. This is being tracked in [this GitHub issue](https://github.com/getsentry/sentry/issues/103095).
+
+</Alert>
+
 ### Trace Drains
 
 After selecting the Traces data type, you'll need to configure the drain to send data to Sentry.