import: cpan: Move tests to tests/import/cpan.scm.

* tests/cpan.scm: Move to tests/import/cpan.scm.
* gnu/packages/admin.scm (ansible): Update comment.
* Makefile.am: Refresh it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

Makefile.am

@@ -548,7 +548,6 @@ SCM_TESTS =					\
   tests/combinators.scm			\
   tests/composer.scm				\
   tests/containers.scm				\
-  tests/cpan.scm				\
   tests/cpio.scm				\
   tests/cran.scm				\
   tests/crate.scm				\
@@ -570,6 +569,7 @@ SCM_TESTS =					\
   tests/graph.scm				\
   tests/gremlin.scm				\
   tests/hexpm.scm				\
+  tests/import/cpan.scm				\
   tests/import/hackage.scm			\
   tests/import/pypi.scm				\
   tests/home-import.scm				\

gnu/packages/admin.scm

@@ -3334,7 +3334,7 @@ provides the following commands:
     (native-search-paths
      ;; XXX: Attempting to use (package-native-search-paths python)
      ;; here would cause an error about python being an unbound
-     ;; variable in the tests/cpan.scm test.
+     ;; variable in the tests/import/cpan.scm test.
      (list (search-path-specification
             (variable "GUIX_PYTHONPATH")
             (files (list "lib/python3.11/site-packages")))))