fix(helm): Fix Cogstack-ce-helm dependency charts not being vendored

[alhendrickson]

Cogstac-ce-helm is broken as the nested subcharts arent inside the tar.gz file.

vscode ➜ . (main) $ helm template opensearch .
Error: Opensearch/charts/cogstack-ce/charts/medcat-trainer/templates/nginx-configmap.yaml:161:26
  executing "Opensearch/charts/cogstack-ce/charts/medcat-trainer/templates/nginx-configmap.yaml" at <include "medcat-trainer-helm.solrURL" .>:
    error calling include:
Opensearch/charts/cogstack-ce/charts/medcat-trainer/templates/_helpers.tpl:97:57
  executing "medcat-trainer-helm.solrURL" at <include "medcat-trainer-helm.solrPort" .>:
    error calling include:
Opensearch/charts/cogstack-ce/charts/medcat-trainer/templates/_helpers.tpl:89:11
  executing "medcat-trainer-helm.solrPort" at <.Values.solr.service.ports.http>:
    nil pointer evaluating interface {}.ports

Use --debug flag to render out invalid YAML