Fix some issues deploying Uyuni released

[meaksh]

What does this PR change?

This PR fixes two issues detected when deploying Uyuni released version:

• Fix state to configure DB in uyuni-released
• Fix some issues related to avahi (avahi-lang not existing in some cases - not really required for avahi functionality)
• Fix issue propagating product_version when defined for single modules [0]

[0] if the product_version is not set at modules/xxxx/main.tf then it won't be available here: https://github.com/uyuni-project/sumaform/blob/master/backend_modules/libvirt/host/main.tf#L18 meaning, it will always fetch the product_version defined in "base", not allowing defining it for individual nodes.

[Copilot]

Pull Request Overview

This PR addresses deployment issues for Uyuni released version by fixing database configuration state matching and resolving Avahi package dependencies. The changes ensure proper database configuration for all Uyuni versions and improve Avahi installation compatibility across different SUSE Linux Enterprise versions.

• Simplified version matching logic for database configuration to include all Uyuni versions
• Added support for additional SUSE Linux Enterprise versions (15.4, 15.5, 15.6) in Avahi repository configuration
• Removed optional avahi-lang package dependency that may not exist in all environments

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
salt/server_containerized/large_deployment.sls	Simplified version check to apply database configuration to all Uyuni versions
salt/default/avahi.sls	Added repository URLs for SLE 15.4-15.6 and removed optional avahi-lang package

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