Devcontainer extension list is ignored if home directory is a volume

• VSCode Version: 1.87.1
• Local OS Version: Sonoma 14.4
• Remote OS Version: Debian 12
• Remote Extension/Connection Type: Containers

Steps to Reproduce:

1. Mount container home directory as a local volume so that it persists between runs
2. Build container
3. Add an extension to devcontainer.json
4. Rebuild container
5. Observe that new extension is not installed

The logs seem to indicate that this has something to do with the "extension cache":

[33556 ms] Extensions cache, install extensions: None
[33557 ms] Start: Run in container: test -d /root/.vscode-server/extensionsCache && ls /root/.vscode-server/extensionsCache || true

The output of the command above does not include the extension added to devcontainer.json, which makes sense -- it's listing a cache created on the last run of the container, before the changes.

However it does seem to me that devcontainer.json should be respected over the cache.