[ci] Enable VecCore with Vc to show that it doesn't work in the CI

Author: guitargeek

.github/workflows/root-ci-config/buildconfig/global.txt

@@ -24,9 +24,9 @@ builtin_openui5=ON
 builtin_pcre=OFF
 builtin_tbb=OFF
 builtin_unuran=OFF
-builtin_vc=OFF
+builtin_vc=ON
 builtin_vdt=OFF
-builtin_veccore=OFF
+builtin_veccore=ON
 builtin_xrootd=OFF
 builtin_xxhash=OFF
 builtin_zeromq=ON
@@ -97,9 +97,9 @@ tmva=ON
 unfold=ON
 unuran=ON
 uring=OFF
-vc=OFF
+vc=ON
 vdt=ON
-veccore=OFF
+veccore=ON
 vecgeom=OFF
 webgui=ON
 win_broken_tests=OFF