[windows] Enable SourceKit tests in CI.

Author: drodriguez

utils/build-windows.bat

@@ -238,7 +238,7 @@ cmake "%source_root%\swift"^
     -DSWIFT_BUILD_STATIC_SDK_OVERLAY:BOOL=NO^
     -DLLVM_INSTALL_TOOLCHAIN_ONLY:BOOL=YES^
     -DSWIFT_BUILD_SOURCEKIT:BOOL=YES^
-    -DSWIFT_ENABLE_SOURCEKIT_TESTS:BOOL=NO^
+    -DSWIFT_ENABLE_SOURCEKIT_TESTS:BOOL=YES^
     -DSWIFT_INSTALL_COMPONENTS="autolink-driver;compiler;clang-resource-dir-symlink;stdlib;sdk-overlay;editor-integration;tools;sourcekit-inproc;swift-remote-mirror;swift-remote-mirror-headers"^
     -DSWIFT_PARALLEL_LINK_JOBS=8^
     -DPYTHON_EXECUTABLE:PATH=%PYTHON_HOME%\python.exe^