Refs #21228: Add RELEASE_SUPPORT.md with Fast DDS references

Signed-off-by: JesusPoderoso <jesuspoderoso@eprosima.com>

Author: JesusPoderoso

RELEASE_SUPPORT.md

@@ -0,0 +1,4 @@
+# Release support
+
+
+Please, refer to the [main branch](https://github.com/eProsima/Fast-DDS-Python/blob/master/RELEASE_SUPPORT.md) for the latest version of this document.

fastdds_python.repos

@@ -6,7 +6,7 @@ repositories:
     fastcdr:
         type: git
         url: https://github.com/eProsima/Fast-CDR.git
-        version: v1.0.24
+        version: 1.0.x
     fastdds:
         type: git
         url: https://github.com/eProsima/Fast-DDS.git
@@ -18,9 +18,4 @@ repositories:
     fastddsgen:
         type: git
         url: https://github.com/eProsima/Fast-DDS-Gen.git
-        version: v2.1.2
-    fastddsgen/thirdparty/idl-parser:
-        type: git
-        url: https://github.com/eProsima/IDL-Parser.git
-        version: v1.2.0
-
+        version: 2.1.x