`DotNetCoreCLIV2` should respect `rollForward` in `global.json`

Required Information

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Question, Bug, or Feature?
Type: Feature

Enter Task Name: DotNetCoreCLIV2

Environment

• Server - Azure Pipelines or TFS on-premises?

Using Azure Pipelines but this isn’t environment specific

• Agent - Hosted or Private:

Using self hosted agents but this isn’t environment specific

Issue Description

When using DotNetCoreCLIV2 and pulling the information from a global.json file, it’s not considering [rollForward[(https://docs.microsoft.com/en-us/dotnet/core/tools/global-json?tabs=netcore3x). Example, if specifying "version": "3.1.100" with "rollForward": "latestPatch", it should be able to install 3.1.106 (or whichever is the latest at that time)

It might be possible to do something similar using 3.1.x as a version number, but that doesn’t seem to be valid within global.json.

Task logs

Starting: UseDotNet
==============================================================================
Task         : Use .NET Core
Description  : Acquires a specific version of the .NET Core SDK from the internet or the local cache and adds it to the PATH. Use this task to change the version of .NET Core used in subsequent tasks. Additionally provides proxy support.
Version      : 2.171.0
Author       : Microsoft Corporation
Help         : https://aka.ms/AA4xgy0
==============================================================================
Found version 3.1.100 in channel 3.1 for user specified version spec: 3.1.100
Getting URL to download .NET Core sdk version: 3.1.100.
Detecting OS platform to find correct download package for the OS.
/home/vsts/work/_tasks/UseDotNet_b0ce7256-7898-45d3-9cb5-176b752bfea6/2.171.0/externals/get-os-distro.sh
Primary:linux-x64
Legacy:ubuntu.18.04-x64
Detected platform (Primary): linux-x64
Detected platform (Legacy): ubuntu.18.04-x64
Version 3.1.100 was not found in cache.
Downloading: https://download.visualstudio.microsoft.com/download/pr/d731f991-8e68-4c7c-8ea0-fad5605b077a/49497b5420eecbd905158d86d738af64/dotnet-sdk-3.1.100-linux-x64.tar.gz
Extracting downloaded package /home/vsts/work/_temp/4f922889-2d5d-47d8-9904-cfaaebd08953.
Extracting archive
/bin/tar xzC /home/vsts/work/_temp/c44417c1-deba-40ec-9856-2fa4c4a3c1f8 -f /home/vsts/work/_temp/4f922889-2d5d-47d8-9904-cfaaebd08953
Successfully installed .NET Core sdk version 3.1.100.
Creating global tool path and pre-pending to PATH.
Finishing: UseDotNet

logs_32.zip

Troubleshooting

Checkout how to troubleshoot failures and collect debug logs: https://docs.microsoft.com/en-us/vsts/build-release/actions/troubleshooting

Error logs

[Insert error from the logs here for a quick overview]

[bishal-pdMSFT]

We are not planning to make this enhancement. A workaround exists to use a well tested complete version in global.json.

[Herve-M]

@bishal-pdMSFT Would it be possible to share how to A workaround exists to use a well tested complete version in global.json. ?