Pin the version of the ansible package

We should be pinning the version of Ansible we use in our Packer
projects to mirror the version used in our Ansible role projects.

Co-authored-by: Shane Frasier <[email protected]>

requirements.txt

@@ -1,4 +1,18 @@
-ansible
+# With the release of version 2.10, Ansible finally correctly
+# identifies Kali Linux as being the Kali distribution of the Debian
+# OS family.  This simplifies a lot of things for roles that support
+# Kali Linux, so it makes sense to force the installation of Ansible
+# 2.10 or newer.
+#
+# We need at least version 6 to correctly identify Amazon Linux 2023
+# as using the dnf package manager, and version 8 is currently the
+# oldest supported version.
+#
+# We have tested against version 9.  We want to avoid automatically
+# jumping to another major version without testing, since there are
+# often breaking changes across major versions.  This is the reason
+# for the upper bound.
+ansible>=8,<10
 boto3
 docopt
 semver