Copying InstallModule.ps1 from tools folder, main branch (#16589)

tools/Installer/InstallModule.ps1

@@ -0,0 +1,39 @@
+<#
+.SYNOPSIS
+    .
+.DESCRIPTION
+    .
+.PARAMETER ModuleName
+    Name of the module to install. By default all modules are installed.
+.PARAMETER SourceLocation
+    Specifies the path for discovering and installing modules from.
+    Taking current folder as source location by default
+.EXAMPLE
+    C:\PS> ./InstallModule.ps1 -ModuleName Az.Accounts
+.NOTES
+    Author: Beisi Zhou
+    Date:   July 21, 2021    
+#>
+
+[cmdletbinding()]
+param(
+  [string]
+  [Parameter(Mandatory = $false, Position = 0, HelpMessage = "Name of the module to install. By default all modules are installed.")]
+  $ModuleName = "Az",
+  [string]
+  [Parameter(Mandatory = $false, Position = 1, HelpMessage = "Specifies the path for discovering and installing modules from.")]
+  $SourceLocation = $PSScriptRoot
+)
+
+$gallery = [guid]::NewGuid().ToString()
+Write-Host "Registering temporary repository $gallery with InstallationPolicy Trusted..."
+Register-PSRepository -Name $gallery -SourceLocation $SourceLocation -PackageManagementProvider NuGet -InstallationPolicy Trusted    
+
+try {
+  Write-Host "Installing $ModuleName..."
+  Install-Module -Name $ModuleName -Repository $gallery -Scope CurrentUser -AllowClobber -Force 
+}
+finally {
+  Write-Host "Unregistering gallery $gallery..."
+  Unregister-PSRepository -Name $gallery
+}