chore: merge release v2.3.0 to main

Merge #6162

Syncs version bump and CHANGELOG from release v2.3.0 to main.

Co-authored-by: Kathy Wu <wukathy@google.com>
COPYBARA_INTEGRATE_REVIEW=#6162 from google:release/v2.3.0 a2bc0d8
PiperOrigin-RevId: 934519702

Author: 2 people

.github/.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "2.2.0"
+  ".": "2.3.0"
 }

.github/release-please-config.json

@@ -56,5 +56,5 @@
       ]
     }
   },
-  "last-release-sha": "cd81f7bde91df78d6cece539a6f98dda2aa8c9c0"
+  "last-release-sha": "0cb4c814928f579bfbac9b9e1f95669e4304e089"
 }