ci: Use ansible 2.19 for fedora 42 testing; support python 3.13

[richm]

NOTE: This also requires upgrading to tox-lsr 3.11.0

Ansible 2.19 will be released soon and has some changes which will
require fixes in system roles. This adds 2.19 to our testing matrix
on fedora 42 so that we can start addressing these issues.

python 3.13 is now being used on some platforms.

Using ansible-core 2.18 requires using py311 for pylint and other
python checkers.

[sourcery-ai]

Reviewer's Guide

This PR enhances CI by adding Python 3.13 testing, upgrading the tox-lsr helper to v3.11.0 across workflows, and shifting Fedora 42 Ansible jobs to ansible-core 2.19 for early validation.

File-Level Changes

Change	Details	Files
Add Python 3.13 to the CI matrix	Inserted a Python 3.13 entry in the unit-test workflow matrix	.github/workflows/python-unit-test.yml
Bump tox-lsr to v3.11.0	Updated pip install URLs to use tox-lsr@3.11.0 in all workflows	.github/workflows/python-unit-test.yml .github/workflows/qemu-kvm-integration-tests.yml .github/workflows/ansible-lint.yml .github/workflows/ansible-managed-var-comment.yml .github/workflows/ansible-test.yml
Switch Fedora 42 tests to Ansible 2.19	Changed qemu-kvm integration env to ansible-core-2.19 on Fedora 42 Updated TFT job’s Fedora 42 ansible_version to 2.19	.github/workflows/qemu-kvm-integration-tests.yml .github/workflows/tft.yml

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[sourcery-ai]

Hey @richm - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Review instructions: all looks good
• 🟢 Testing: all looks good
• 🟢 Documentation: all looks good

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