Re-enable 'testModuleAliasingPrebuiltWithScanDeps'.

It appears the test setup resulted in us being unable to find modules when passing them as explicit dependencies to depending compiler invocations. Setting an explicit module cache path helps with that.

Resolves rdar://88073675

Author: artemcm

Tests/SwiftDriverTests/ExplicitModuleBuildTests.swift

@@ -603,8 +603,6 @@ final class ExplicitModuleBuildTests: XCTestCase {
 
 
   func testModuleAliasingPrebuiltWithScanDeps() throws {
-    // rdar://88073675
-    throw XCTSkip("Skipping, known failure (rdar://88073675).")
     try withTemporaryDirectory { path in
       let sdkArgumentsForTesting = (try? Driver.sdkArgumentsForTesting()) ?? []
       let (stdLibPath, shimsPath, _, _) = try getDriverArtifactsForScanning()
@@ -625,6 +623,7 @@ final class ExplicitModuleBuildTests: XCTestCase {
                                      "Bar",
                                      "-emit-module",
                                      "-emit-module-path", moduleBarPath,
+                                     "-module-cache-path", path.nativePathString(escaped: true),
                                      "-I", stdLibPath.nativePathString(escaped: true),
                                      "-I", shimsPath.nativePathString(escaped: true),
                               ] + sdkArgumentsForTesting,