Use release staging storage container name instead of build ID for update-dependencies-internal logic

[lbussell]

Follow-up to #7002, still working towards #6915.

After this, the plan is to get the release staging to tag itself with the staging container names of the images that it builds and stages.

[Copilot]

Pull request overview

This pull request refactors the update-dependencies-internal infrastructure to use stage container names (e.g., "stage-1234567") instead of integer build IDs. This is a follow-up to PR #7002 and works towards implementing issue #6915, which aims to have the release staging pipeline tag builds with release storage account staging container names for better coordination between .NET release pipelines and .NET containers release pipelines.

Changes:

• Changed parameter and internal storage from integer build IDs to string stage container names throughout the codebase
• Introduced a new PipelinesService to centralize Azure DevOps build operations
• Renamed InternalStagingBuilds to InternalStageContainers and updated the storage file from "internal-versions.txt" to "stage-containers.txt"

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/UpdateDependencies.Tests/SyncInternalReleaseTests.cs	Updated test data to use stage container strings instead of integer build IDs
tests/UpdateDependencies.Tests/InternalStagingBuildsTests.cs	Renamed class references and updated test data types; removed redundant imports
tests/UpdateDependencies.Tests/FromStagingPipelineCommandTests.cs	Updated test parameters to use stage container strings and added mock for new PipelinesService
eng/update-dependencies/Sync/InternalStageContainers.cs	Renamed from InternalStagingBuilds; changed version mapping from int to string
eng/update-dependencies/Sync/IInternalVersionsService.cs	Updated interface to accept stage container strings instead of build IDs
eng/update-dependencies/Sync/InternalVersionsService.cs	Updated implementation; changed filename constant to "stage-containers.txt"
eng/update-dependencies/Sync/SyncInternalReleaseCommand.cs	Updated to use stage container strings throughout the sync process
eng/update-dependencies/PipelinesService.cs	New service extracting Azure DevOps pipeline operations for better separation of concerns
eng/update-dependencies/PipelineArtifactProvider.cs	Refactored to use new PipelinesService instead of directly accessing Azure DevOps clients
eng/update-dependencies/FromStagingPipelineOptions.cs	Changed parameter from int to string; added extension method with regex validation to extract build ID
eng/update-dependencies/FromStagingPipelineCommand.cs	Updated to accept stage container strings; added diagnostic logging of pipeline tags
eng/pipelines/update-dependencies-internal-unofficial.yml	Updated parameter to pass stage container string instead of build ID
eng/pipelines/update-dependencies-internal-official.yml	Updated parameter to pass stage container string instead of build ID
eng/pipelines/pipelines/update-dependencies-internal.yml	Updated parameter definition and usage for stage container strings

Comments suppressed due to low confidence (1)

eng/update-dependencies/Sync/InternalStageContainers.cs:18

• There is an extra space in the XML doc comment. The cref attribute should be <see cref="InternalStageContainers"/> without the space after the opening tag.