[CI] Update to newer linux image on internal pipeline

[radical]

No description provided.

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 15055

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 15055"

[Copilot]

Pull request overview

This PR updates the internal CI pipeline to use a newer Azure Linux 3 (Azure Linux 3.0) image instead of the deprecated CBL-Mariner 2 image for Linux build agent pools, aligning the build_sign_native.yml template with the rest of the pipeline infrastructure which already uses Azure Linux 3-based images.

Changes:

• Replaces the 1es-mariner-2 pool image with 1es-azurelinux-3 for Linux agents in the native build/sign pipeline template.

[akoeplinger]

@radical FYI we're using build.azurelinux.3.amd64 pretty much everywhere else. The 1es-azurelinux-3 contains a lot of additional stuff which we typically don't need (makes the image bigger and slower to pull)