ci: support openSUSE Leap in qemu/kvm test matrix

[richm]

Some of our system roles now support openSUSE Leap so add this
platform to our testing matrix.

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

Summary by Sourcery

CI:

• Add openSUSE Leap 15.6 to the QEMU/KVM integration test matrix and case mapping

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR extends the QEMU/KVM integration test GitHub Actions workflow to include openSUSE Leap 15.6 by updating the test matrix and shell logic for platform detection.

File-Level Changes

Change	Details	Files
Add openSUSE Leap 15.6 to the test matrix	Insert new matrix entry for leap-15.6 with ansible-core 2.18	.github/workflows/qemu-kvm-integration-tests.yml
Enable platform detection for Leap images	Add case branch for leap-* to set platform and version	.github/workflows/qemu-kvm-integration-tests.yml

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[sourcery-ai]

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