Remove a useless large test, and add a debug assertion

The test innodb_fts.fulltext_table_evict was only creating 1000 tables
with fulltext indexes, only to check that no tables with fulltext
indexes are being evicted.

The reason why tables containing fulltext indexes cannot be evicted is
that fts_optimize_init() invokes dict_table_prevent_eviction().

mysql-test/suite/innodb_fts/r/fulltext_table_evict.result

-#
-# Bug Bug #27304661 MYSQL CRASH DOING SYNC INDEX ]
-# [FATAL] INNODB: SEMAPHORE WAIT HAS LASTED > 600
-#
-CREATE TABLE t1 (
-id INT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
-f1 TEXT(500),
-FULLTEXT idx (f1)
-) ENGINE=InnoDB;
-insert into t1 (f1) values ('fjdhfsjhf'),('dhjfhjshfj'),('dhjafjhfj');
-set @save_table_definition_cache=@@global.table_definition_cache;
-set @save_table_open_cache=@@global.table_open_cache;
-set global table_definition_cache=400;
-set global table_open_cache= 1024;
-SET @save_dbug = @@GLOBAL.debug_dbug;
-SET GLOBAL DEBUG_DBUG="+d,crash_if_fts_table_is_evicted";
-set @@global.table_definition_cache=@save_table_definition_cache;
-set @@global.table_open_cache=@save_table_open_cache;
-drop table t1;

mysql-test/suite/innodb_fts/t/fulltext_table_evict.test

---source include/have_innodb.inc
---source include/have_debug.inc
---source include/big_test.inc
---source include/have_64bit.inc
-
---echo #
---echo # Bug Bug #27304661 MYSQL CRASH DOING SYNC INDEX ]
---echo # [FATAL] INNODB: SEMAPHORE WAIT HAS LASTED > 600
---echo #
-
-CREATE TABLE t1 (
-       id INT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,
-       f1 TEXT(500),
-       FULLTEXT idx (f1)
-       ) ENGINE=InnoDB;
-insert into t1 (f1) values ('fjdhfsjhf'),('dhjfhjshfj'),('dhjafjhfj');
-
---source include/restart_mysqld.inc
-
-set @save_table_definition_cache=@@global.table_definition_cache;
-set @save_table_open_cache=@@global.table_open_cache;
-
-set global table_definition_cache=400;
-set global table_open_cache= 1024;
-
-SET @save_dbug = @@GLOBAL.debug_dbug;
-SET GLOBAL DEBUG_DBUG="+d,crash_if_fts_table_is_evicted";
-#Create 1000 tables, try the best to evict t1 .
-
---disable_query_log
-let $loop=1000;
-while($loop)
-{
-  eval create table t_$loop(id int, name text(100), fulltext idxt_$loop(name) )engine=innodb;
-  dec $loop;
-}
-
-let $loop=1000;
-while($loop)
-{
-  eval drop table t_$loop;
-  dec $loop;
-}
-
-SET GLOBAL DEBUG_DBUG = @save_dbug;
---enable_query_log
-set @@global.table_definition_cache=@save_table_definition_cache;
-set @@global.table_open_cache=@save_table_open_cache;
-drop table t1;

mysql-test/unstable-tests

@@ -519,7 +519,6 @@ innodb.xa_recovery                           : MDEV-15279 - mysqld got exception
 #-----------------------------------------------------------------------
 
 innodb_fts.fulltext2                   : Modified in 10.2.26
-innodb_fts.fulltext_table_evict        : Modified in 10.2.27
 innodb_fts.innodb_fts_misc             : Modified in 10.2.27
 innodb_fts.innodb_fts_misc_debug       : MDEV-14156 - Unexpected warning
 innodb_fts.innodb_fts_plugin           : MDEV-13888 - Errors in server log

storage/innobase/dict/dict0dict.cc

@@ -1442,14 +1442,7 @@ dict_make_room_in_cache(
 	        prev_table = UT_LIST_GET_PREV(table_LRU, table);
 
 		if (dict_table_can_be_evicted(table)) {
-
-			DBUG_EXECUTE_IF("crash_if_fts_table_is_evicted",
-			{
-				  if (table->fts &&
-				      dict_table_has_fts_index(table)) {
-					ut_ad(0);
-				  }
-			};);
+			ut_ad(!table->fts);
 			dict_table_remove_from_cache_low(table, TRUE);
 
 			++n_evicted;