[clojure] Fixes to support lumo 1.6.0.

[clojure] Fixes to support lumo 1.6.0.

- Pass down the CLJ_MODE value for DOCKERIZED builds in addition to
  run/tests.
- Correct deps so that node_modules is installed for CLJ_MODE=cljs for
  all steps.
- Lumo 1.6.0 is currently not able to install globally as root
  (https://github.com/anmonteiro/lumo/issues/206) so add the local
  node_modules/.bin to the PATH in the run script.
- Reader conditionals needed for clojure.reader/cljs.reader until this
  is fixed: https://github.com/anmonteiro/lumo/issues/209