cleanup: remove have_mysql_upgrade.inc

mysql-test/include/have_mysql_upgrade.inc

---require r/have_mysql_upgrade.result
---disable_query_log
-select LENGTH("$MYSQL_UPGRADE")>0 as have_mysql_upgrade;
---enable_query_log

mysql-test/include/mysql_upgrade_preparation.inc

@@ -2,13 +2,6 @@
 
 # Can't run test of external client with embedded server
 -- source include/not_embedded.inc
-
-# Only run test if "mysql_upgrade" is found
---require r/have_mysql_upgrade.result
---disable_query_log
-select LENGTH("$MYSQL_UPGRADE")>0 as have_mysql_upgrade;
---enable_query_log
-
 #
 # Hack:
 #

mysql-test/r/have_mysql_upgrade.result

-have_mysql_upgrade
-1

mysql-test/suite/rpl/t/rpl_mysql_upgrade.test

@@ -5,11 +5,9 @@
 # options are added into mysql_upgrade. These options control whether sql
 # statements are binlogged or not. 
 #############################################################################
---source include/master-slave.inc
 --source include/have_innodb.inc
-
-# Only run test if "mysql_upgrade" is found
---source include/have_mysql_upgrade.inc
+--source include/mysql_upgrade_preparation.inc
+--source include/master-slave.inc
 
 call mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT");
 call mtr.add_suppression("table or database name 'mysqltest-1'");

mysql-test/t/log_tables_upgrade.test

---source include/not_embedded.inc
 --source include/have_csv.inc
 --source include/have_innodb.inc
-
-# Only run test if "mysql_upgrade" is found
---require r/have_mysql_upgrade.result
---disable_query_log
-select LENGTH("$MYSQL_UPGRADE")>0 as have_mysql_upgrade;
---enable_query_log
+--source include/mysql_upgrade_preparation.inc
 
 --echo #
 --echo # Bug#49823: mysql_upgrade fatal error due to general_log / slow_low CSV NULL