Replace CBL-Mariner with Azure Linux

[takano32]

Summary

Replace the CBL-Mariner build target with Azure Linux 3.0.

This updates the distro target from cbl-mariner to azurelinux and switches the base image from:

• mcr.microsoft.com/cbl-mariner/base/core:2.0

to:

• mcr.microsoft.com/azurelinux/base/core:3.0

Changes

• Rename the Docker Compose service from cbl-mariner to azurelinux
• Replace the GitHub Actions matrix entry cbl-mariner with azurelinux
• Rename cbl-mariner/Dockerfile to azurelinux/Dockerfile
• Use tdnf instead of yum
• Install Azure Linux kernel build dependencies based on the upstream Azure Linux kernel build guide
• Update entrypoint.sh to detect ID=azurelinux

Notes

The kernel source still uses:

https://github.com/microsoft/CBL-Mariner-Linux-Kernel.git

because Microsoft’s Azure Linux kernel build guide still points to this repository for AzureLinux kernel builds.

Test

Expected local test:

docker compose build azurelinux
docker compose run --rm --env CI=true azurelinux