Clean projectinfomanager (#6850)

* Expose IsScript from CompileOps so IVT is not needed

* Undo rename of internal VersionStamp in PatternMatcher

Author: cartermp

src/fsharp/service/service.fs

@@ -3325,3 +3325,5 @@ module PrettyNaming =
     let QuoteIdentifierIfNeeded id = Lexhelp.Keywords.QuoteIdentifierIfNeeded id
     let KeywordNames = Lexhelp.Keywords.keywordNames
 
+module FSharpFileUtilities =
+    let isScriptFile (fileName: string) = CompileOps.IsScript fileName

src/fsharp/service/service.fsi

@@ -761,3 +761,6 @@ module public PrettyNaming =
     /// All the keywords in the F# language 
     val KeywordNames : string list
 
+/// A set of helpers for dealing with F# files.
+module FSharpFileUtilities =
+    val isScriptFile : string -> bool

vsintegration/src/FSharp.Editor/LanguageService/FSharpProjectOptionsManager.fs

@@ -10,7 +10,6 @@ open System.ComponentModel.Composition
 open System.IO
 open System.Linq
 open Microsoft.CodeAnalysis
-open FSharp.Compiler.CompileOps
 open FSharp.Compiler.SourceCodeServices
 open Microsoft.VisualStudio
 open Microsoft.VisualStudio.FSharp.Editor
@@ -359,7 +358,7 @@ type internal FSharpProjectOptionsManager
         let parsingOptions =
             match reactor.TryGetCachedOptionsByProjectId(document.Project.Id) with
             | Some (_, parsingOptions, _) -> parsingOptions
-            | _ -> { FSharpParsingOptions.Default with IsInteractive = IsScript document.Name }
+            | _ -> { FSharpParsingOptions.Default with IsInteractive = FSharpFileUtilities.isScriptFile document.Name }
         CompilerEnvironment.GetCompilationDefinesForEditing parsingOptions     
 
     member this.TryGetOptionsByProject(project) =