Add kerberos support for keystoneauth1

This change introduces python source packages and the corresponding
libkrb5 libraries from the archive.

Change-Id: Ie6d6dc9e7981897cf9751a8f6416e0d7c6e2ecc5

snapcraft.yaml

@@ -168,6 +168,7 @@ parts:
       - python-zaqarclient
       - python-neutronclient
       - python-openstackclient
+      - keystoneauth1[kerberos]
       - gnocchiclient
       - python-octaviaclient
       - setuptools_scm
@@ -178,6 +179,7 @@ parts:
       - https://raw.githubusercontent.com/openstack/requirements/stable/2024.1/upper-constraints.txt
     build-packages:
       - libffi-dev
+      - libkrb5-dev
       - libssl-dev
       - libxml2-dev
       - libxslt1-dev
@@ -186,6 +188,8 @@ parts:
       - cython3
       - rustc
       - cargo
+    stage-packages:
+      - libkrb5-3
     override-prime: |
       craftctl default
       # This is the last step, let's now compile all our pyc files.