Implement Ansible roles for Rocky Linux Testing Framework

- Added `bootstrap_sparrowdo` role for bootstrapping Sparrowdo on a VM.
- Introduced `cleanup_vm` role for cleaning up VMs and disk images.
- Created `download_image` role to download and cache QCOW2 images.
- Developed `golden_image` role for creating and customizing golden images.
- Implemented `provision_vm` role for provisioning VMs as linked clones.
- Added `run_test` role for executing tests with Sparrowdo.
- Created playbooks for building golden images, running single tests, and running test suites.
- Enhanced documentation with usage examples, configuration details, and troubleshooting tips.
- Added support for multiple cloud providers (AWS, Azure) in the test execution workflow.

Signed-off-by: Stephen Simpson <ssimpson89@users.noreply.github.com>

ansible/roles/download_image/defaults/main.yml

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+---
+# Default variables for download_image role
+# Most settings come from inventory (group_vars)
+
+# Return variable name for the downloaded image path
+image_path_var: "base_image_path"

ansible/roles/download_image/tasks/main.yml

@@ -0,0 +1,24 @@
+---
+- name: Ensure base images directory exists
+  file:
+    path: "{{ base_images_dir }}"
+    state: directory
+    mode: '0755'
+  become: true
+
+- name: Set cached image path
+  set_fact:
+    cached_image_path: "{{ base_images_dir }}/{{ qcow2_url | basename }}"
+
+- name: Download QCOW2 image
+  get_url:
+    url: "{{ qcow2_url }}"
+    dest: "{{ cached_image_path }}"
+    mode: '0644'
+    timeout: "{{ download_timeout }}"
+    force: "{{ force_download }}"
+  become: true
+
+- name: Set image path fact
+  set_fact:
+    "{{ image_path_var }}": "{{ cached_image_path }}"