Revert "tree-wide: use CONF_FILES_CHASE_BASENAME where root directory is specified"

This reverts commit 6b606f3586.

The commit was mistakenly merged without review, and has several issues.
Let's revert at least now.

src/shared/hwdb-util.c

@@ -601,9 +601,7 @@ int hwdb_update(const char *root, const char *hwdb_bin_dir, bool strict, bool co
 
         trie->nodes_count++;
 
-        err = conf_files_list_strv(&files, ".hwdb", root,
-                                   CONF_FILES_REGULAR | CONF_FILES_CHASE_BASENAME | CONF_FILES_FILTER_MASKED,
-                                   conf_file_dirs);
+        err = conf_files_list_strv(&files, ".hwdb", root, 0, conf_file_dirs);
         if (err < 0)
                 return log_error_errno(err, "Failed to enumerate hwdb files: %m");
 

src/shared/install.c

@@ -3298,9 +3298,7 @@ static int presets_find_config(RuntimeScope scope, const char *root_dir, char **
         else
                 assert_not_reached();
 
-        return conf_files_list_strv(files, ".preset", root_dir,
-                                    CONF_FILES_REGULAR | CONF_FILES_CHASE_BASENAME | CONF_FILES_FILTER_MASKED,
-                                    dirs);
+        return conf_files_list_strv(files, ".preset", root_dir, 0, dirs);
 }
 
 static int read_presets(RuntimeScope scope, const char *root_dir, UnitFilePresets *presets) {