v2_test: Add a test-distro-1 repository

This also adds an actual repository json file for the test-disro.
Without this the repo.ListDistros() function doesn't return any actual
distros.

Related: RHEL-60125

internal/cloudapi/v2/v2_test.go

@@ -80,6 +80,7 @@ func newV2Server(t *testing.T, dir string, depsolveChannels []string, enableJWT
 	repos, err := reporegistry.New([]string{"../../../test/data"})
 	require.Nil(t, err)
 	require.NotNil(t, repos)
+	require.Greater(t, len(repos.ListDistros()), 0)
 
 	config := v2.ServerConfig{
 		JWTEnabled:           enableJWT,