NFS-aware .bashrc.local and VS Code dirs for work servers

- Remove zet* from _is_work_host (local git server, not a work host)
- setup_enterprise_ai_bash.sh: detect NFS home on work servers, relocate
  .bashrc.local to /opt/kenjim/ with symlink, handle re-runs safely
- setup_enterprise_ai_bash.sh: symlink ~/.vscode-server and
  ~/.vscode-remote-containers to /opt/kenjim/ on NFS hosts
- dotfiles_manager.sh: deploy-to detects NFS on remote, deploys
  .bashrc.local to /opt/kenjim/ with symlink, backs up symlink targets
- hosts/etqc-kenjim-11.bashrc.local: add NFS note to header

.ssh/config

@@ -84,9 +84,12 @@ Host kold
     HostName  etqc-kenjim-01.juniper.net
 
 # TaaS dev machine
-Host ktaas
+Host qtaas
     HostName  kenjim-taas.qengk8.juniper.net
 
+Host btaas
+    HostName  kenjim-taas.bengk8.juniper.net
+
 # Temp machine — Bangalore K8
 Host ktb
     HostName  kenjim-temp.bengk8.juniper.net