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

Configure CI and test workflows to run Ansible with fact variables injection disabled and align documentation with the ansible_facts key style.

CI:

• Set ANSIBLE_INJECT_FACT_VARS=false for qemu-kvm integration tests to enforce the non-injected facts behavior.
• Pass SR_ANSIBLE_INJECT_FACT_VARS=false into TFT workflow runs to ensure consistent Ansible fact handling in tests.

Documentation:

• Clarify README-ostree ansible_facts usage by switching to double-quoted dictionary key notation in examples.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Configures CI and test infrastructure to run Ansible with fact variable injection disabled by default, and updates documentation to use the non-deprecated ansible_facts key access syntax.

File-Level Changes

Change	Details	Files
Update README to reflect the preferred ansible_facts key access syntax with double quotes.	Change ansible_facts examples from single-quoted key access to double-quoted key access in documentation. Ensure the documented DISTRO-VERSION examples still match the facts used by Ansible.	README-ostree.md
Ensure CI integration tests run with Ansible fact variable injection disabled by default.	Set ANSIBLE_INJECT_FACT_VARS environment variable to "false" in the qemu-kvm integration tests GitHub Actions workflow so test runs use the non-injected fact style. Wire the new fact injection setting into the testing framework tooling variable SR_ANSIBLE_INJECT_FACT_VARS in the tft GitHub Actions workflow so downstream tests can honor the new default.	.github/workflows/qemu-kvm-integration-tests.yml .github/workflows/tft.yml

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