Upgrade Node20 version to 20.19.2 due to security vulnerability

[terinvarghese]

Context

Upgrade node js 20.x to the next non vulnerable version. Reference: https://www.tenable.com/plugins/nessus/236766

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Description

Upgrade Node20 version from 2.18.2 to 2.19.2

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Risk Assessment (Low / Medium / High)

2.18.3 has documentation updates and fix on root certificate updater. All changes in 2.19.0-2 are minor upgrades and all tests existing tests are passing. Hence Risk assessment is marked as Low as its a minor version upgrade of Node js.

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Unit Tests Added or Updated (Yes / No)

No unit tests were modified or added. All tests of dev test script are passing. Evidence attached in comments.

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Additional Testing Performed

List manual or automated tests performed beyond unit tests (e.g., integration, scenario, regression).

[terinvarghese]

@AdityaMankal-MS Can you check this PR?

[AdityaMankal-MS]

@terinvarghese, please update the risk assessment in the PR description. Mention why the risk is considered low.
Also, please attach any detail/evidence of the Agent being tested with the new Node runtime.

[terinvarghese]

@AdityaMankal-MS
Outcome of dev test command below. The trx files from Test Results folder is also attached.
_codespaces-ba333e_2025-05-31_16_55_24.trx.txt

Starting test execution, please wait...
  A total of 1 test files matched the specified pattern.
  [xUnit.net 00:00:00.7971492]   Discovering: Test
  [xUnit.net 00:00:01.3886686]   Discovered:  Test
  [xUnit.net 00:00:01.4452349]   Starting:    Test
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.CheckoutL1Tests.NoCheckout [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.ConditionsL1Tests.Conditions_Failed [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.ConfigL1Tests.TrackingConfigsShouldBeConsistentAcrossMulticheckoutRuns [6 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.ConfigL1Tests.TrackingConfigsShouldBeConsistentAcrossRunsWithDifferentCheckouts [2 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.ConfigL1Tests.TrackingConfigsShouldBeConsistentAcrossRuns [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.ContainerL1Tests.StepTarget_RestrictedMode(writeToBlobstorageService: False) [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.ContainerL1Tests.StepTarget_RestrictedMode(writeToBlobstorageService: True) [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.CoreL1Tests.Test_Base_Node10(writeToBlobstorageService: False) [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.CoreL1Tests.Test_Base_Node10(writeToBlobstorageService: True) [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.CoreL1Tests.Test_Base [1 s]
  [xUnit.net 00:00:22.3371593]   Finished:    Test
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.VariableL1Tests.SetVariable_ReadVariable(writeToBlobstorageService: True) [1 s]
    Passed Microsoft.VisualStudio.Services.Agent.Tests.L1.Worker.VariableL1Tests.SetVariable_ReadVariable(writeToBlobstorageService: False) [1 s]
  Results File: /workspaces/azure-pipelines-agent/src/Test/TestResults/_codespaces-ba333e_2025-05-31_16_57_32.trx
  
  Test Run Successful.
  Total tests: 12
       Passed: 12
   Total time: 22.8440 Seconds