cleanup perfschema.short_options_1 test

the test tests whether short options work on the server command line

* remove 'show variables' for variables not affected by short options
* remove options, that are not short
* remove options, that cannot be tested from SQL
  * in particular, -T12 doesn't affect the test output,
    but cases ~30sec delay on shutdown
* use -W1 as -W2 is the default, so doesn't affect the test output

mysql-test/suite/perfschema/r/short_option_1.result

@@ -13,11 +13,6 @@ utf8mb3
 show global variables like 'character_set_system';
 Variable_name	Value
 character_set_system	utf8mb3
-show global variables like 'general_log';
-Variable_name	Value
-general_log	ON
-show global variables like 'new';
-Variable_name	Value
 show global variables like 'log_warnings';
 Variable_name	Value
-log_warnings	2
+log_warnings	1

mysql-test/suite/perfschema/t/short_option_1-master.opt

--a -Cutf8 --collation-server=utf8_bin -T12 -W2
+-a -Cutf8 -W1

mysql-test/suite/perfschema/t/short_option_1.test

@@ -11,8 +11,4 @@ show global variables like 'sql_mode';
 select @@character_set_server;
 show global variables like 'character_set_system';
 
-show global variables like 'general_log';
-
-show global variables like 'new';
-
 show global variables like 'log_warnings';