feat: unblock artifact streaming for arm64 nodes and remove support on mariner

[KananMehta]

What this PR does / why we need it:

Required to enable artifact streaming on arm nodepools. Also bump binary version and remove path for AzLinux 2.0 since it is being deprecated and there is no new binary for it.

[Copilot]

Pull request overview

This PR adds ARM64 support for artifact streaming packages. Previously, ARM64 architectures were excluded from artifact streaming installation; now the code appends -arm64 to the package name when running on ARM64 and removes the ARM64 exclusion guards.

Changes:

• Append -arm64 suffix to the artifact streaming package name when building on ARM64
• Remove isARM64 exclusion checks for Ubuntu, Mariner 2.0, and Azure Linux 3.0
• Fix MIRROR_DOWNLOAD_PATH to use the (potentially modified) PACKAGE_NAME variable instead of $1

Comments suppressed due to low confidence (1)

vhdbuilder/packer/install-dependencies.sh:536

• Lines 534 and 536 still reference $2 directly instead of using $PACKAGE_EXTENSION. While functionally equivalent, this is inconsistent with the change on line 531 where $1 was replaced with $PACKAGE_NAME / $PACKAGE_EXTENSION. For consistency and clarity, these should also use $PACKAGE_EXTENSION.

  if [ "$2" = "deb" ]; then
    apt_get_install 30 1 600 $MIRROR_DOWNLOAD_PATH || exit $ERR_ARTIFACT_STREAMING_DOWNLOAD
  elif [ "$2" = "rpm" ]; then

---

You can also share your feedback on Copilot code review. Take the survey.

[Copilot]

Pull request overview

Enables artifact streaming on ARM64 Linux node images by removing the previous ARM64 gating and selecting architecture-specific artifact streaming packages during VHD build.

Changes:

• Append -arm64 to the artifact streaming package name when building on ARM64.
• Remove the ARM64 exclusion for Ubuntu (20.04+) artifact streaming enablement.
• Update artifact streaming package version from 0.3.0 to 0.3.1 and narrow Azure Linux logic to 3.0 only.

---

You can also share your feedback on Copilot code review. Take the survey.

[Copilot]

Pull request overview

This PR enables artifact streaming on ARM64 nodepools by switching the artifact package name to an -arm64 variant at install time, and removes the Azure Linux 2.0 artifact streaming path due to deprecation.

Changes:

• Update artifact streaming installer to download ARM64-specific packages on ARM64 hosts.
• Bump mirror proxy version from 0.3.0 to 0.3.1.
• Remove artifact streaming enablement path for Azure Linux 2.0; keep Azure Linux 3.0.

Comments suppressed due to low confidence (1)

vhdbuilder/packer/install-dependencies.sh:539

• Unquoted variable expansions here can cause word-splitting/globbing issues (and rm is especially risky). Quote "$MIRROR_DOWNLOAD_PATH" and "$MIRROR_PROXY_URL" when passing them as arguments, and quote the path in rm as well.

  retrycmd_curl_file 10 5 60 $MIRROR_DOWNLOAD_PATH $MIRROR_PROXY_URL || exit ${ERR_ARTIFACT_STREAMING_DOWNLOAD}
  if [ "$2" = "deb" ]; then
    apt_get_install 30 1 600 $MIRROR_DOWNLOAD_PATH || exit $ERR_ARTIFACT_STREAMING_DOWNLOAD
  elif [ "$2" = "rpm" ]; then
    dnf_install 30 1 600 $MIRROR_DOWNLOAD_PATH || exit $ERR_ARTIFACT_STREAMING_DOWNLOAD
  fi
  rm $MIRROR_DOWNLOAD_PATH

---

You can also share your feedback on Copilot code review. Take the survey.

[Copilot]

Pull request overview

Enable artifact streaming on ARM64 node pools by selecting ARM64-specific packages, bumping the mirror proxy version, and removing the deprecated AzLinux/Mariner 2.0 installation path.

Changes:

• Append -arm64 to artifact streaming package name on ARM64 nodes.
• Bump MIRROR_PROXY_VERSION to 0.3.1.
• Remove artifact streaming install path for Mariner/Azure Linux 2.0; keep Azure Linux 3.0.

---

You can also share your feedback on Copilot code review. Take the survey.

[SriHarsha001]

You may want to consider this small suggestion from AI about using "$PACKAGE_EXTENSION" instead of "$2".

[ganeshkumarashok]

Would recommend testing with Agentbaker e2e + test VHD before merging