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

* tests/gem.scm: Move to tests/import/gem.scm.
* Makefile.am: Refresh it.
* CODEOWNERS: Update.

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

CODEOWNERS

@@ -301,7 +301,7 @@ guix/build/ruby-build-system\.scm                  @guix/ruby
 guix/build-system/ruby\.scm                        @guix/ruby
 guix/import/gem\.scm                               @guix/ruby
 guix/scripts/import/gem\.scm                       @guix/ruby
-tests/gem\.scm                                     @guix/ruby
+tests/import/gem\.scm                              @guix/ruby
 
 gnu/packages/(crates|rust)(-.+|)\.scm$             @guix/rust
 gnu/packages/sequoia\.scm                          @guix/rust

Makefile.am

@@ -556,7 +556,6 @@ SCM_TESTS =					\
   tests/discovery.scm				\
   tests/elpa.scm				\
   tests/file-systems.scm			\
-  tests/gem.scm				\
   tests/gexp.scm				\
   tests/git.scm					\
   tests/git-authenticate.scm			\
@@ -570,6 +569,7 @@ SCM_TESTS =					\
   tests/import/crate.scm			\
   tests/import/egg.scm				\
   tests/import/elm.scm				\
+  tests/import/gem.scm				\
   tests/import/hackage.scm			\
   tests/import/pypi.scm				\
   tests/home-import.scm				\

etc/teams.scm

@@ -919,7 +919,7 @@ release."
                       "guix/build-system/ruby.scm"
                       "guix/import/gem.scm"
                       "guix/scripts/import/gem.scm"
-                      "tests/gem.scm")))
+                      "tests/import/gem.scm")))
 
 (define-team rust
   (team 'rust