Revert "Copy helpers internally (#8476)"

This reverts commit 1d48e0a.

Author: pmattos

Package.swift

@@ -725,7 +725,7 @@ let package = Package(
 
         // MARK: Additional Test Dependencies
 
-            .testTarget(
+            .target(
                 /** SwiftPM internal build test suite support library */
                 name: "_InternalBuildTestSupport",
                 dependencies: [
@@ -734,13 +734,12 @@ let package = Package(
                     "SwiftBuildSupport",
                     "_InternalTestSupport"
                 ],
-                path: "Sources/_InternalBuildTestSupport",
                 swiftSettings: [
                     .unsafeFlags(["-static"]),
                 ]
             ),
 
-        .testTarget(
+        .target(
             /** SwiftPM internal test suite support library */
             name: "_InternalTestSupport",
             dependencies: [
@@ -755,7 +754,6 @@ let package = Package(
                 .product(name: "OrderedCollections", package: "swift-collections"),
                 "Workspace",
             ],
-            path: "./Sources/_InternalTestSupport",
             swiftSettings: [
                 .unsafeFlags(["-static"]),
             ]