Separate package list and add show package dependency tree
Separate package list and add show package dependency tree

Details:

* This change separates the display of the installed packages into separate
  GitHub Actions steps for finding them more easily in a log, and it adds
  showing the package dependency tree bvia pipdeptree.

Signed-off-by: Andreas Maier <38dbb04957d222ea6ce72de72413b1e55e665472@de.ibm.com>

zhmcclient/python-zhmcclient,zhmcclient/python-zhmcclient