update mariner Linux image to 2.0

[wfurt]

MsQuic now works on Centos 7 & Mariner 2.0
(fix for microsoft/msquic#3422 rolled into 2.1.8)

https://helixre107v0xdcypoyl9e7f.blob.core.windows.net/dotnet-runtime-refs-pull-81973-merge-808ab19800c3444c99/System.Net.Quic.Functional.Tests/1/console.0eaba122.log

Console log: 'System.Net.Quic.Functional.Tests' from job 808ab198-00c3-444c-9983-c24f3929b683 (ubuntu.1804.amd64.open.rt) using docker image mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-helix-amd64 on a00A27U


----- start Fri Mar 17 18:44:21 UTC 2023 =============== To repro directly: =====================================================
pushd .
/root/helix/work/correlation/dotnet exec --runtimeconfig System.Net.Quic.Functional.Tests.runtimeconfig.json --depsfile System.Net.Quic.Functional.Tests.deps.json xunit.console.dll System.Net.Quic.Functional.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing 
popd
===========================================================================================================
/root/helix/work/workitem/e /root/helix/work/workitem/e
  Discovering: System.Net.Quic.Functional.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Net.Quic.Functional.Tests (found 113 of 122 test cases)
  Starting:    System.Net.Quic.Functional.Tests (parallel test collections = on, max threads = 2)
    System.Net.Quic.Tests.MsQuicPlatformDetectionTests.UnsupportedPlatforms_ThrowsPlatformNotSupportedException [SKIP]
      Condition(s) not met: "IsQuicUnsupported"
  Finished:    System.Net.Quic.Functional.Tests
=== TEST EXECUTION SUMMARY ===
   System.Net.Quic.Functional.Tests  Total: 337, Errors: 0, Failed: 0, Skipped: 1, Time: 89.975s
/root/helix/work/workitem/e

fixes #81901

[ghost]

Tagging subscribers to this area: @dotnet/area-infrastructure-libraries
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Issue Details

---

PoC

Author:	wfurt
Assignees:	wfurt
Labels:	area-Infrastructure-libraries
Milestone:	-

[ghost]

Tagging subscribers to this area: @dotnet/ncl
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Issue Details

---

PoC

Author:	wfurt
Assignees:	wfurt
Labels:	area-System.Net.Quic
Milestone:	-

[wfurt]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[carlossanlop]

@wfurt Friendly reminder that all RID changes that we want to include in the March Servicing Release need to be backported to 6.0 and 7.0 by tomorrow, which is the Code Complete day.

cc @mmitche @rbhanda

[CarnaViire]

LGTM, thanks!

[wfurt]

Xml test failures are unrelated.