Spec Header Dirs: Only first include/ (#13991)

* CUDA HeaderList: Unit Test

* Spec Header Dirs: Only first include/

Avoid matching recurringly nested include paths that usually
refer to internally shipped libraries in packages.
Example in CUDA Toolkit, shipping a libc++ fork internally
with libcu++ since 10.2.89:
`<prefix>/include/cuda/some/more/details/include/` or
`<prefix>/include/cuda/std/detail/libcxx/include`

regex: non-greedy first match of include

Co-Authored-By: Massimiliano Culpo <massimiliano.culpo@gmail.com>

* CUDA: Re-Enable 10.2.89 as Default

var/spack/repos/builtin/packages/cuda/package.py

@@ -60,8 +60,7 @@ class Cuda(Package):
         key = "{0}-{1}".format(platform.system(), platform.machine())
         pkg = packages.get(key)
         if pkg:
-            version(ver, sha256=pkg[0], url=pkg[1], expand=False,
-                    preferred=(ver == "10.1.243"))  # see GH issue 13969
+            version(ver, sha256=pkg[0], url=pkg[1], expand=False)
 
     # macOS Mojave drops NVIDIA graphics card support -- official NVIDIA
     # drivers do not exist for Mojave. See