Add YamlDotNet installation step to pipeline and remove redundant code (Azure#28220)

Author: vidai-msft

.azure-pipelines/sync-aliases.yml

@@ -34,11 +34,20 @@ jobs:
       dotnet tool install powershell --version 7.4.*
     displayName: Install PowerShell 7.4.x
 
+  - pwsh: |
+      if (-not (Get-PackageProvider -Name NuGet -ErrorAction SilentlyContinue)) {
+        Install-PackageProvider -Name NuGet -Force
+      }
+      Install-Package -Name YamlDotNet -RequiredVersion $(YamlDotNetVersion) -ProviderName NuGet -Force -ErrorAction Stop
+    displayName: Install YamlDotNet NuGet Package
+    retryCountOnTaskFailure: 5
+
   - pwsh: |
       dotnet tool run pwsh -NoLogo -NoProfile -NonInteractive -File ./tools/Github/ParseServiceContactsList.ps1 -AccessToken $env:SYSTEM_ACCESSTOKEN
     env:
       SYSTEM_ACCESSTOKEN: $(System.AccessToken)
     displayName: Update resourceManagement.yml file locally
+    condition: succeeded()
 
   - pwsh: |
       $hasChanges = git diff --name-only .github/policies

tools/Github/ParseServiceContactsList.ps1

@@ -26,11 +26,6 @@ function InitializeRequiredPackages {
     [CmdletBinding()]
     param ()
 
-    if (-not (Get-PackageProvider -Name NuGet -ErrorAction SilentlyContinue)) {
-        Install-PackageProvider -Name NuGet -Force
-    }
-
-    Install-Package -Name YamlDotNet -RequiredVersion ${env:YamlDotNetVersion} -ProviderName NuGet -Force
     $pkgYaml = Get-Package -Name YamlDotNet | Select-Object -ExpandProperty Source | Split-Path
     $dllYaml = Join-Path -Path $pkgYaml -ChildPath "lib" | Join-Path -ChildPath "netstandard2.0" | Join-Path -ChildPath "YamlDotNet.dll"
     Add-Type -LiteralPath $dllYaml