feat: Koji Tag Definitions

[Tonisal-byte]

This pull request introduces configuration changes to support the Azure Linux Staging repository and its build infrastructure. The updates add new TOML sections for staging, define build and output sources, and specify Koji tag settings for RPM and container builds. These changes are foundational for enabling package builds and release management for the Azure Linux Staging environment.

Configuration for Azure Linux Staging repository:

• Added [distros.azurelinux-staging] section in azurelinux.distro.toml to define the staging repo, including description, default version, branch, and input/output sources for upstream repositories, source stores, and package repositories.

Build infrastructure for staging:

• Created azurelinux.distro.tags.toml with Koji tag configurations for RPM and container builds, including architecture support, mock build environment settings, RPM macros, and build groups for both RPM and SRPM builds.

Resource definitions and examples:

• Included commented examples in azurelinux.distro.toml for source stores, package repositories, and upstream git repos, illustrating how to define external resources for the build process.