Add Start-PSBootstrap to add installed dotnet to path

.pipelines/templates/release-validate-globaltools.yml

@@ -43,6 +43,9 @@ jobs:
     - pwsh: |
         $repoRoot = "$(Build.SourcesDirectory)/PowerShell"
 
+        Import-Module "$repoRoot/build.psm1" -Force -Verbose
+        Start-PSBootstrap -Scenario Dotnet
+
         $toolPath = New-Item -ItemType Directory "$(System.DefaultWorkingDirectory)/toolPath" | Select-Object -ExpandProperty FullName
 
         Write-Verbose -Verbose "dotnet tool list -g"

.pipelines/templates/release-validate-sdk.yml

@@ -51,6 +51,9 @@ jobs:
     - pwsh: |
         $repoRoot = "$(Build.SourcesDirectory)"
 
+        Import-Module "$repoRoot/build.psm1" -Force -Verbose
+        Start-PSBootstrap -Scenario Dotnet
+
         $env:DOTNET_NOLOGO=1
 
         $localLocation = "$(Pipeline.Workspace)/PSPackagesOfficial/drop_nupkg_build_nupkg"