refactor: simplify components.json code

[chewi]

What this PR does / why we need it:

This massively simplifies the associated code involving jq. It's a powerful tool. 🙂

This also allows the OS variant to be used in components.json for OS Guard.

testPackagesInstalled() was not testing OS Guard properly because OS and OS_VERSION were being set to Ubuntu and 3.0, matching nothing from components.json.

Several components are not installed for OS Guard, but rather than add yet more shell code to handle this, simplify things by making it possible to use the OS variant in components.json. OS Guard's VARIANT_ID is osguard, but this is upper-cased by our scripts. Use DEFAULT to match an OS without VARIANT_ID.

[Copilot]

Pull request overview

This PR refactors the components.json handling to simplify the code and add support for OS variants (specifically OS Guard). The changes eliminate fallback compatibility code for deprecated versions and multiArchVersions fields, streamline jq-based JSON parsing, and enable OS variant-specific package configurations.

Changes:

• Removed fallback support for deprecated versions and multiArchVersions fields in components.json
• Simplified package version and URL retrieval using more efficient jq filters
• Added OS variant support to distinguish between standard Azure Linux and Azure Linux OS Guard configurations
• Updated components.json to use azurelinux/DEFAULT and azurelinux/OSGUARD variants for GPU-related packages
• Removed OS Guard-specific conditional logic from installation scripts by using <SKIP> markers in components.json

Reviewed changes

Copilot reviewed 24 out of 80 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
parts/linux/cloud-init/artifacts/cse_helpers.sh	Core refactor: replaced updateRelease() with getPackageJSON(), simplified version/URL extraction with jq
parts/linux/cloud-init/artifacts/cse_install.sh	Added OS_VARIANT parameter to package lookup functions
parts/linux/cloud-init/artifacts/ubuntu/cse_install_ubuntu.sh	Pass OS_VARIANT to credential provider installation
parts/linux/cloud-init/artifacts/mariner/cse_install_mariner.sh	Pass OS_VARIANT to credential provider installation
parts/linux/cloud-init/artifacts/azlosguard/cse_install_osguard.sh	Pass OS_VARIANT to credential provider installation
vhdbuilder/packer/install-dependencies.sh	Removed OS Guard conditional checks for containerd, oras, and GPU packages
vhdbuilder/packer/test/linux-vhd-content-test.sh	Added OS Guard SKU detection and OS_VARIANT initialization
parts/common/components.json	Added OSGUARD variant with SKIP markers, changed 3 azurelinux entries to azurelinux/DEFAULT
schemas/components.cue	Added azurelinux/DEFAULT and azurelinux/OSGUARD to schema
pkg/vhdbuilder/datamodel/component_configs.go	Changed MultiArchVersions from string array to struct array
pkg/vhdbuilder/datamodel/component_configs_test.go	Updated test expectations for new multiArchVersionsV2 structure
e2e/components/components.go	Updated to check for DEFAULT variant when reading package versions
spec/parts/linux/cloud-init/artifacts/test_components.json	Removed deprecated multiArchVersions and versions test data
spec/parts/linux/cloud-init/artifacts/cse_helpers_spec.sh	Updated tests to use new getPackageJSON function, fixed typo
parts/linux/cloud-init/artifacts/README-COMPONENTS.md	Added documentation about OS variant support

[Copilot]

Pull request overview

Copilot reviewed 24 out of 77 changed files in this pull request and generated 1 comment.