[BUG]: FileTransform@2 task fails if "Changes are already present in the package."

[woeterman94]

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• I searched for existing GitHub issues
• I read pipeline troubleshooting guide
• I checked how to collect logs

Task name

FileTransform@2

Task version

2.249.1

Issue Description

The taks (and build) fails entirely if there is nothing to transform. Version 2.249.1.

Behavior before (version 2.246.1)

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

Windows_NT (10.0.20348)

Relevant log output

Starting: Transform appsettings.json
==============================================================================
Task         : File transform
Description  : Replace tokens with variable values in XML or JSON configuration files
Version      : 2.246.1
Author       : Microsoft Corporation
Help         : https://docs.microsoft.com/azure/devops/pipelines/tasks/utility/file-transform
==============================================================================
Applying JSON variable substitution for **/appsettings.json
Applying JSON variable substitution for H:\_work_agent\3\s\REDACTED\web\appsettings.json
Applying JSON variable substitution for H:\_work_agent\3\s\REDACTED\web\bin\Release\net8.0\appsettings.json
##[error]Failed to apply JSON variable substitution. Changes are already present in the package.
Finishing: Transform appsettings.json

Full task logs with system.debug enabled

No response

Repro steps

[Devvox93]

Duplicate of #20835