Revert "[release/9.0] Fix intermediate artifact upload collisions for NativeAOT and Mono"

[steveisok]

Reverts #125564

[Copilot]

Pull request overview

Reverts the prior change that made NativeAOT/Mono intermediate artifact upload paths job-specific, returning to a single shared intermediate-artifacts subdirectory for those builds in runtime-official.yml.

Changes:

• Revert NativeAOT intermediate artifact subdirectory name back to NativeAOTRuntimePacks (non-matrix-qualified).
• Revert Mono intermediate artifact subdirectory name back to MonoRuntimePacks for multiple Mono matrix jobs/variants.
• Update workload package download patterns to target IntermediateArtifacts/MonoRuntimePacks/... (no wildcard), with one duplicated pattern entry introduced.

[Copilot]

upload-intermediate-artifacts-step.yml publishes everything under $(Build.StagingDirectory)/IntermediateArtifacts/${{ parameters.name }} into the shared IntermediateArtifacts pipeline artifact. In this platform-matrix (many platforms/jobs), using a constant name: NativeAOTRuntimePacks means multiple jobs will publish into the same artifact subdirectory, which can overwrite/lose files (and was previously avoided by including $(osGroup)$(osSubgroup)_$(archType)). Consider restoring a job-unique suffix (e.g., include $(osGroup)$(osSubgroup)_$(archType) and/or the matrix variant) so each job publishes to its own subfolder.

[Copilot]

Multiple Mono platform-matrix jobs (regular, wasm/wasi, multithread, crossaot, llvmaot) all call upload-intermediate-artifacts-step.yml. With name: MonoRuntimePacks shared across these jobs, they will publish into the same IntermediateArtifacts/MonoRuntimePacks subdirectory, making artifact contents dependent on upload order and risking overwrites. Reintroduce a unique name per job (e.g., MonoRuntimePacks_$(osGroup)$(osSubgroup)_$(archType) and/or include $(runtimeVariant) / $(nameSuffix)) to keep outputs isolated.

[Copilot]

The DownloadPipelineArtifact patterns list includes Microsoft.NETCore.App.Runtime.Mono.multithread.browser-wasm*.nupkg twice (lines 631 and 635). This is redundant and can lead to duplicate copies/overwrites during the subsequent flatten step; remove the duplicate entry.

Suggested change

IntermediateArtifacts/MonoRuntimePacks/Shipping/Microsoft.NETCore.App.Runtime.Mono.multithread.browser-wasm*.nupkg

[dotnet-policy-service]

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