Remove Python management-plane API review pipeline workarounds

[tjprescott]

Problem

Python management-plane SDKs currently do not generate API token files or an ApiHash. This requires pipeline workarounds around package approval and release completion.

** Prerequiste **
ARH must update the get-approval-status endpoint to support a packageType value of mgmt or client.
https://msft.ghe.com/devdiv/azure-sdk-tools/issues/23

Required work

• Remove --filter-type=Omit_management from eng/pipelines/templates/steps/run_apistub.yml to ensure API token files are generated for management-plane SDKs.
• Update eng/scripts/save_package_api_hash.py and its tests/comments to expect management-plane token files.
• Generate and store ApiHash for management-plane packages so the ARH portion of mark-released can succeed.
• Remove the management-plane filter before the get-package-approval-status stage.
• Pass PackageInfo packageType through the approval-status workflow.-
• Remove eng/scripts/Filter-PackageInfoForPackageApproval.ps1 and its pipeline wiring.
• Remove the management-plane workaround around Mark Package Released in eng/pipelines/templates/stages/archetype-python-release.yml.

Acceptance criteria

• Management-plane packages generate token files and ApiHash.
• Approval status succeeds with packageType=mgmt without requiring an API review, per policy in ARH.
• Data-plane packages use packageType=client.
• Management-plane releases are marked complete in ARH.
• Python package approval and release completion pipelines contain no SdkType == mgmt workarounds.

Other management-plane special cases to audit separately

These are other management-plane related workarounds that won't be touched as part of this work:

• eng/pipelines/templates/steps/run_black.yml excludes management packages.
• eng/pipelines/templates/steps/run_pylint.yml excludes management packages.
• eng/pipelines/templates/stages/python-analyze-weekly.yml excludes management packages from next-Pylint.
• eng/common/scripts/Verify-RestApiSpecLocation.ps1 skips Python management packages during release validation.