Change release status of GPT-5.1 to GA (#58634)

Author: its-mia

data/tables/copilot/model-release-status.yml

@@ -48,14 +48,14 @@
 
 - name: 'GPT-5.1'
   provider: 'OpenAI'
-  release_status: 'Public preview'
+  release_status: 'GA'
   agent_mode: true
   ask_mode: true
   edit_mode: true
 
 - name: 'GPT-5.1-Codex'
   provider: 'OpenAI'
-  release_status: 'Public preview'
+  release_status: 'GA'
   agent_mode: true
   ask_mode: true
   edit_mode: true

data/tables/copilot/model-supported-clients.yml

@@ -112,7 +112,7 @@
 - name: GPT-5.1
   dotcom: true
   vscode: true
-  vs: false
+  vs: true
   eclipse: true
   xcode: true
   jetbrains: true