ci: use ANSIBLE_INJECT_FACT_VARS=false by default for testing

[richm]

Ansible 2.20 has deprecated the use of Ansible facts as variables. For
example, ansible_distribution is now deprecated in favor of
ansible_facts["distribution"]. This is due to making the default
setting INJECT_FACTS_AS_VARS=false. For now, this will create WARNING
messages, but in Ansible 2.24 it will be an error.

In order to ensure that commits and PRs conform to this, use
ANSIBLE_INJECT_FACT_VARS=false by default in our CI testing.

Update README-ostree.md if needed.

See https://docs.ansible.com/projects/ansible/latest/porting_guides/porting_guide_core_2.20.html#inject-facts-as-vars

Signed-off-by: Rich Megginson rmeggins@redhat.com

Summary by Sourcery

Align CI testing and documentation with Ansible’s deprecation of injecting facts as top-level variables.

CI:

• Set ANSIBLE_INJECT_FACT_VARS=false in GitHub Actions workflows to test against the non-injected facts behavior.
• Propagate the ANSIBLE_INJECT_FACT_VARS setting into Terraform-based test runs via SR_ANSIBLE_INJECT_FACT_VARS.

Documentation:

• Update README-ostree.md to reference ansible_facts-based distribution variables instead of deprecated ansible_distribution variables.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Configures CI to run Ansible with fact variable injection disabled by default and updates documentation to reference the new ansible_facts syntax instead of deprecated fact variables.

File-Level Changes

Change	Details	Files
Update README to reference ansible_facts-based keys instead of deprecated fact variables.	Adjust description of DISTRO-VERSION to refer to ansible_facts["distribution"] and ansible_facts["distribution_version"] instead of ansible_distribution and ansible_distribution_version	README-ostree.md
Ensure GitHub Actions workflows run Ansible with fact variable injection disabled.	Set ANSIBLE_INJECT_FACT_VARS="false" in the qemu-kvm integration test workflow environment Pass SR_ANSIBLE_INJECT_FACT_VARS=false through Terraform-related GitHub Actions job environment to propagate the setting into tests	.github/workflows/qemu-kvm-integration-tests.yml .github/workflows/tft.yml

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