Adding Get-MSBuildPathModified with Telemetry under Feature flags

[praval-microsoft]

to avoid reflection for the new vs studio versions since it causes assembly conflict.

Related issue 20734

This portion of the Get-MsBuildPath function script first locates Microsoft.Build.Utilities.Core.dll and then uses it to locate the msbuild.exe. Under the current preview version of VS this fails due to an assembly conflict.
Fortunately for us, the reflection usage here is redundant, since the msbuild exe lives either in the same folder as this .dll file or in its direct subfolder.
These paths are fixed due to the way VS installation works - e.g. if we have location of the .dll file, we have the location of both of these versions of msbuild.

$Architecture = 'x64'

$Path = "C:\Program Files\Microsoft Visual Studio\2022\Preview\MSBuild\Current\Bin\Microsoft.Build.Utilities.Core.dll"
$msUtilities = [System.Reflection.Assembly]::LoadFrom($Path)

[type]$t = $msUtilities.GetType('Microsoft.Build.Utilities.ToolLocationHelper')
if ($t -ne $null) 
{
    [System.Reflection.MethodInfo] $mi = $t.GetMethod("GetPathToBuildToolsFile",[type[]]@( [string], [string], $msUtilities.GetType("Microsoft.Build.Utilities.DotNetFrameworkArchitecture") ))

$param3 = $mi.GetParameters()[2]
    $archValues = [System.Enum]::GetValues($param3. ParameterType)

[object] $archValue = $null
        if ($Architecture -eq 'x86') {
            $archValue = $archValues.GetValue(1) # DotNetFrameworkArchitecture.Bitness32
        } elseif ($Architecture -eq 'x64') {
            $archValue = $archValues.GetValue(2) # DotNetFrameworkArchitecture.Bitness64
        } else {
            $archValue = $archValues.GetValue(1) # DotNetFrameworkArchitecture.Bitness32
        }
    Write-Host "archValue = $archValue"

$msBuildPath = $mi.Invoke($null, @( 'msbuild.exe', '17.0', $archValue ))
    $msBuildPath
}

Testing

• Tested the Feature Flag logic by deploying the MSBuildTask with Updated MSBuildHelpers package in a personal test organisation.
• Verified for the Visual Studio 15,16 and 17 for both Architectures x64 and x86.