Add StringTools to do-not-deploy list (#354)

* Add StringTools to do-not-deploy list

An internal tool recently had trouble updating to .NET 10 because
it deployed a stale local copy of `Microsoft.NET.StringTools.dll` that
was working (by coincidence) throughout .NET 9 but failed after
dotnet/msbuild#12100 added some API surface to StringTools and used it.

* Add nuget dependency as well

---------

Co-authored-by: Chet Husk <baronfel@users.noreply.github.com>

Author: rainersigwald

src/MSBuildLocator/build/Microsoft.Build.Locator.targets

@@ -13,7 +13,9 @@
             '%(PackageReference.Identity)' == 'Microsoft.Build.Conversion.Core' or
             '%(PackageReference.Identity)' == 'Microsoft.Build.Runtime' or
             '%(PackageReference.Identity)' == 'Microsoft.Build.Localization' or
-            '%(PackageReference.Identity)' == 'Microsoft.Build.Engine'
+            '%(PackageReference.Identity)' == 'Microsoft.Build.Engine' or
+            '%(PackageReference.Identity)' == 'Microsoft.NET.StringTools' or
+            '%(PackageReference.Identity)' == 'NuGet.Frameworks'
           )"/>
     </ItemGroup>
     <Error