[chore] add ntpreceiver to contrib distro (#36877)

This receiver is already part of contrib, adding to README.

receiver/ntpreceiver/README.md

@@ -4,11 +4,12 @@
 | Status        |           |
 | ------------- |-----------|
 | Stability     | [alpha]: metrics   |
-| Distributions | [] |
+| Distributions | [contrib] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Areceiver%2Fntp%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Areceiver%2Fntp) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Areceiver%2Fntp%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Areceiver%2Fntp) |
 | [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@atoulme](https://www.github.com/atoulme) |
 
 [alpha]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/component-stability.md#alpha
+[contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
 <!-- end autogenerated section -->
 
 > :construction: This receiver is in development. Configuration fields and metric data model are subject to change.

receiver/ntpreceiver/metadata.yaml

@@ -4,7 +4,7 @@ status:
   class: receiver
   stability:
     alpha: [metrics]
-  distributions: []
+  distributions: [contrib]
   codeowners:
     active: [atoulme]
 

reports/distributions/contrib.yaml

@@ -159,6 +159,7 @@ components:
         - namedpipe
         - nginx
         - nsxt
+        - ntp
         - opencensus
         - oracledb
         - otelarrow