[nats-streaming] Release v0.23.2 (#2084)

Details can be found [here](https://github.com/nats-io/nats-streaming-server/releases/tag/v0.23.2)

nats-streaming/README-short.txt

@@ -1 +1 @@
-NATS Streaming is an open-source, high-performance, cloud native messaging streaming system.
+DEPRECATED; An open-source, high-performance, cloud native messaging streaming system.

nats-streaming/deprecated.md

@@ -0,0 +1 @@
+The NATS Streaming Server is being deprecated. Critical bug fixes and security fixes will be applied until June of 2023. NATS enabled applications requiring persistence should use [JetStream](https://docs.nats.io/jetstream/jetstream).