Respect env variable NUGET_PACKAGES in additonal locations (#8624)

* Respect NUGET_PACKAGES in FSharpQA test script

* Respect NUGET_PACKAGES in FSharp Test Suite (Cambridge)

* Respect NUGET_PACKAGES in Span tests

* Respect NUGET_PACKAGES in typechecking tests

* Remove unused nuget packages path

Author: Booksbaum

clean.sh

@@ -24,6 +24,7 @@ DEAD_DIRS=(
     "tests/fsharp/tests.fs"
     "tests/fsharp/typecheck"
     "tests/fsharpqa"
+    "tests/scripts"
     "VisualFSharp.sln"
     "vsintegration"
 )