Merged PR 11279165: Onebranch Build Pipeline Update: Remove deprecated auth variables from build pipelines

OneBranchCDPXPatMigrationPlugin V1.1:
# Why this change?
This PR was automatically generated because we are deprecating the service principal token inside CDP_DEFAULT_CLIENT_PAT and CDP_DEFAULT_CLIENT_PACKAGE_PAT variables in your OneBranch Pipelines build configuration. It will be replaced by ADO's system.accesstoken

Per [Retirement of Shared Global Package PAT variables in build containers](https://eng.ms/docs/cloud-ai-platform/azure-edge-platform-aep/aep-engineering-systems/productivity-and-experiences/ce-legacy-infrastructure/onebranch/build/troubleshootingfaqs/retirementofcdpxpatinbuildcontainers),
OneBranch will stop providing automatic authentication for cross-organization package pull and git clone scenarios. Please see the above documentation link for instructions and references for migration.

This PR applies the `EnableCDPxPAT: false` featureFlag to your pipelines, which will show how your pipelines will work after the migration deadline of August 28th, 2024. At this time, coreXT pipelines are not included in this deadline.

**Address the build failures before you merge this pr.**

Please validate your builds against this PR before merging the change, and address any failures. A failure in a PR build with this change indicates that you depend on the CDP_DEFAULT_CLIENT_PAT variable, and will need to make your own identity or make build config changes. Please see [Retirement of Shared Global Package PAT variables in build containers](https://eng.ms/docs/cloud-ai-platform/azure-edge-platform-aep/aep-engineering-systems/productivity-and-experiences/ce-legacy-infrastructure/onebranch/build/troubleshootingfaqs/retirementofcdpxpatinbuildcontainers) for examples.

If you do not experience any build failures due to this change, you will not experience issues with it on the deprecation date. A successful build with this flag indicates that you will not need to do further work on this migration.

For any queries, please reach out to support via OneBranch bot at [aka.ms/onebranch/bot](https://aka.ms/onebranch/bot).
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For feedback or questions about this PR, please use the [OneBranch Support bot](https://aka.ms/onebranch/bot)

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This change was automatically generated by [1ES Gardener](https://eng.ms/docs/cloud-ai-platform/devdiv/one-engineering-system-1es/1es-docs/gardener/1es-gardener) (a [MerlinBot](https://aka.ms/MerlinBot) extension) which is an initiative by the 1ES team to help repos stay up-to-date with latest tools, features, and best practices.

Author: MerlinBot

.pipelines/OneBranch.Official.yml

@@ -42,6 +42,7 @@ extends:
   template: v2/OneBranch.Official.CrossPlat.yml@templates # https://aka.ms/obpipelines/templates
   parameters:
     featureFlags:
+      EnableCDPxPAT: false
       needExceptionForUbuntuUsage: true # Mariner does not currently support all of our cross-compilation targets
       LinuxHostVersion:
         Distribution: Ubuntu # Mariner kernel is incompatible with Ubuntu container; causes infinite loop in ASAN https://github.com/actions/runner-images/issues/9524

.pipelines/OneBranch.PullRequest.yml

@@ -26,6 +26,7 @@ extends:
   template: v2/OneBranch.NonOfficial.CrossPlat.yml@templates # https://aka.ms/obpipelines/templates
   parameters:
     featureFlags:
+      EnableCDPxPAT: false
       needExceptionForUbuntuUsage: true # Mariner does not currently support all of our cross-compilation targets
       LinuxHostVersion:
         Distribution: Ubuntu # Mariner kernel is incompatible with Ubuntu container; causes infinite loop in ASAN https://github.com/actions/runner-images/issues/9524

.pipelines/OneBranch.WindowsUndocked.Official.yml

@@ -77,6 +77,7 @@ extends:
       tsa:
         enabled: false # Disable TSA to force build breaks
     featureFlags:
+      EnableCDPxPAT: false
       WindowsHostVersion: '1ESWindows2022'
     stages:
     - stage: Build

.pipelines/OneBranch.WindowsUndocked.PullRequest.yml

@@ -38,6 +38,7 @@ extends:
       tsa:
         enabled: false # Disable TSA to force build breaks
     featureFlags:
+      EnableCDPxPAT: false
       WindowsHostVersion: '1ESWindows2022'
     stages:
     - stage: Build