fix(devcontainer): delete users group from container

in `Dockerfile`, because the `updateRemoteUserUID` setting of the
devcontainer does not change the `GID` of the `containerUser`
dynamically to the one of the host user if the group exists in the
container already microsoft/vscode-remote-release#2402.

In our case the `containerUser` is set to `bitbots`, because it
automatically uses the last `USER` instruction from the `Dockerfile` and
the `remoteUser` inherits from `containerUser`.

For reference see: microsoft/vscode-remote-release#1155

.devcontainer/Dockerfile

@@ -82,8 +82,12 @@ RUN python3 -m pip install \
 # Set zsh as default shell
 SHELL ["/bin/zsh", "-c"]
 
-# Create user bitbots with home directory and add to sudo group
-RUN useradd -m -U -u "$uid" -G sudo -s /bin/zsh $user \
+# Remove the users group, because when it exists on the host system
+# the devcontainer will not dynamically update the containerUser GID,
+# when the host user is part of the users group.
+# Then create a bitbots user with home directory and add allow it to use sudo
+RUN groupdel users \
+  && useradd -m -U -u "$uid" -G sudo -s /bin/zsh $user \
   && groupmod -g "$gid" $user \
   && echo "$user ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers