move BuildGraph to Facilities (#13159)

src/Compiler/FSharp.Compiler.Service.fsproj

@@ -285,6 +285,12 @@
     <Compile Include="Facilities\CompilerLocationUtils.fs">
       <Link>Facilities\CompilerLocationUtils.fs</Link>
     </Compile>
+    <Compile Include="Facilities\BuildGraph.fsi">
+      <Link>Facilities\BuildGraph.fsi</Link>
+    </Compile>
+    <Compile Include="Facilities\BuildGraph.fs">
+      <Link>Facilities\BuildGraph.fs</Link>
+    </Compile>
     <FsLex Include="AbstractIL\illex.fsl">
       <OtherFlags>--unicode --lexlib Internal.Utilities.Text.Lexing</OtherFlags>
       <Link>AbstractIL\illex.fsl</Link>
@@ -750,12 +756,6 @@
     <Compile Include="DependencyManager/DependencyProvider.fs">
       <Link>Driver\DependencyProvider.fs</Link>
     </Compile>
-    <Compile Include="Driver\BuildGraph.fsi">
-      <Link>Driver\BuildGraph.fsi</Link>
-    </Compile>
-    <Compile Include="Driver\BuildGraph.fs">
-      <Link>Driver\BuildGraph.fs</Link>
-    </Compile>
     <Compile Include="Driver\CompilerConfig.fsi">
       <Link>Driver\CompilerConfig.fsi</Link>
     </Compile>