fix: move prepare_test_soundfiles after skipping test

Move prepare_test_soundfiles after possible skipping test, to not
generate files when not needed.

Signed-off-by: Emilia Kurdybelska <emiliax.kurdybelska@intel.com>

Author: ekurdybx

test-case/check-selector-play.sh

@@ -119,14 +119,14 @@ run_tests()
 main()
 {
     init_globals
-    prepare_test_soundfiles
     check_tplg
 
     start_test
 
     if [[ "$tplg" != *nocodec* ]]; then
         skip_test "Skipping: test currently supported for NO-CODEC platforms only"
     fi
+    prepare_test_soundfiles
 
     logger_disabled || func_lib_start_log_collect