PM-31106: Dev container improvements (#6651)

* Add rust feature

* Give the community create command the non-interactive treatment

* Add ability to load custom root CA

* Update .devcontainer/community_dev/postCreateCommand.sh

Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>

* Update .devcontainer/community_dev/postCreateCommand.sh

Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>

---------

Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>

.devcontainer/internal_dev/devcontainer.json

@@ -9,7 +9,8 @@
   "features": {
     "ghcr.io/devcontainers/features/node:1": {
       "version": "16"
-    }
+    },
+    "ghcr.io/devcontainers/features/rust:1": {}
   },
   "mounts": [
     {
@@ -24,6 +25,7 @@
       "extensions": ["ms-dotnettools.csdevkit"]
     }
   },
+  "onCreateCommand": "bash .devcontainer/internal_dev/onCreateCommand.sh",
   "postCreateCommand": "bash .devcontainer/internal_dev/postCreateCommand.sh",
   "forwardPorts": [1080, 1433, 3306, 5432, 10000, 10001, 10002],
   "portsAttributes": {