MDEV-22933 - remove ---source include/not_threadpool.inc from tests

mysql-test/main/information_schema.test

 # This test  uses grants, which can't get tested for embedded server
 -- source include/not_embedded.inc
 
-#Don't run this test when thread_pool active
---source include/not_threadpool.inc
-
 # check that CSV engine was compiled in, as the result of the test depends
 # on the presence of the log tables (which are CSV-based).
 --source include/have_csv.inc

mysql-test/main/information_schema_db.test

@@ -2,9 +2,6 @@
 # in the embedded server by default). So skip the test in embedded-server mode.
 -- source include/not_embedded.inc
 
-#Don't run this test when thread_pool active
---source include/not_threadpool.inc
-
 -- source include/testdb_only.inc
 
 set local sql_mode="";

mysql-test/main/kill-2.test

@@ -8,7 +8,6 @@
 #
 
 -- source include/not_embedded.inc
--- source include/not_threadpool.inc
 
 --echo #
 --echo # MDEV-6896 kill user command cause MariaDB crash!

mysql-test/main/kill.test

@@ -9,7 +9,6 @@
 
 -- source include/not_embedded.inc
 -- source include/have_debug_sync.inc
--- source include/not_threadpool.inc
 set local sql_mode="";
 set global sql_mode="";
 

mysql-test/main/mysqlshow.test

 # Can't run test of external client with embedded server
 -- source include/not_embedded.inc
-# Don't test when thread_pool active
---source include/not_threadpool.inc
 
 --disable_warnings
 DROP TABLE IF EXISTS t1,t2,test1,test2;

mysql-test/main/named_pipe.test

@@ -5,9 +5,6 @@
 # Named pipe does not support the non-blocking API.
 --disable_non_blocking_api
 
-# thread pool causes different results
--- source include/not_threadpool.inc
-
 # Only run this test if named pipe is avaliable
 let $nmp= query_get_value("SHOW VARIABLES LIKE 'named_pipe'", Value, 1);
 if ($nmp != ON){

mysql-test/main/status_bug17954.test

@@ -4,9 +4,6 @@
 # embedded server causes different stat
 -- source include/not_embedded.inc
 
-# thread pool causes different results
--- source include/not_threadpool.inc
-
 # Save the initial number of concurrent sessions
 --source include/count_sessions.inc
 

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

@@ -2,7 +2,6 @@
 
 --source include/not_embedded.inc
 --source include/have_perfschema.inc
---source include/not_threadpool.inc
 
 
 # Setup : in this main thread

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

@@ -2,7 +2,6 @@
 
 --source include/not_embedded.inc
 --source include/have_perfschema.inc
---source include/not_threadpool.inc
 
 # Setup
 

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

@@ -2,7 +2,6 @@
 
 --source include/not_embedded.inc
 --source include/have_perfschema.inc
---source include/not_threadpool.inc
 
 #
 # Important note:

mysql-test/suite/sys_vars/t/all_vars.test

 --source include/not_embedded.inc
---source include/not_threadpool.inc
 
 #
 # load everything we want to include in the testing

mysql-test/suite/sys_vars/t/wait_timeout_func.test

@@ -22,7 +22,6 @@
 ###############################################################################
 
 --source include/not_embedded.inc
---source include/not_threadpool.inc
 
 SET @start_value= @@global.wait_timeout;
 

storage/rocksdb/mysql-test/rocksdb_sys_vars/t/all_vars.test

 --source include/have_rocksdb.inc
 --source include/not_embedded.inc
---source include/not_threadpool.inc
 
 # This test verifies that *all* MyRocks system variables are tested by the
 # rocksdb_sys_vars suite. For every MyRocks system variable there must be a