fix(connections): discover Sentry OAuth through its MCP resource (#15837)

Correct Sentry OAuth discovery and cover new and saved client registration.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

scripts/ingest-app-definitions.mjs

@@ -783,7 +783,7 @@ const apps = [
       {
         serverUrl: "https://mcp.sentry.dev/mcp",
         discoveryUrl:
-          "https://sentry.io/.well-known/oauth-authorization-server",
+          "https://mcp.sentry.dev/.well-known/oauth-protected-resource/mcp",
       },
       "S2",
       "Connect the Sentry organization and projects agents need for incident work.",