[DO NOT MERGE] Install scripts update validation PR

Author: ellahathaway

eng/common/tools.ps1

@@ -273,7 +273,7 @@ function GetDotNetInstallScript([string] $dotnetRoot) {
   if ($shouldDownload) {
     Create-Directory $dotnetRoot
     $ProgressPreference = 'SilentlyContinue' # Don't display the console progress UI - it's a huge perf hit
-    $uri = "https://builds.dotnet.microsoft.com/dotnet/scripts/$dotnetInstallScriptVersion/dotnet-install.ps1"
+    $uri = "https://raw.githubusercontent.com/dotnet/install-scripts/main/src/dotnet-install.ps1"
 
     Retry({
       Write-Host "GET $uri"

eng/common/tools.sh

@@ -299,7 +299,7 @@ function with_retries {
 function GetDotNetInstallScript {
   local root=$1
   local install_script="$root/dotnet-install.sh"
-  local install_script_url="https://builds.dotnet.microsoft.com/dotnet/scripts/$dotnetInstallScriptVersion/dotnet-install.sh"
+  local install_script_url="https://raw.githubusercontent.com/dotnet/install-scripts/main/src/dotnet-install.sh"
   local timestamp_file="$root/.dotnet-install.timestamp"
   local should_download=false