MDEV-13765 encryption.encrypt_and_grep failed in buildbot with wrong result

- Adjust the test case to check whether all tablespaces
are encrypted by comparing it with existing table count.

mysql-test/suite/encryption/t/encrypt_and_grep.test

@@ -23,8 +23,9 @@ insert t2 values (repeat('tempsecret', 12));
 insert t3 values (repeat('dummysecret', 12));
 
 --echo # Wait max 10 min for key encryption threads to encrypt all spaces
+--let $tables_count= `select count(*) from information_schema.tables where engine = 'InnoDB'`
 --let $wait_timeout= 600
---let $wait_condition=SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0
+--let $wait_condition=SELECT COUNT(*) = $tables_count FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0
 --source include/wait_condition.inc
 
 --sorted_result
@@ -93,8 +94,9 @@ UNLOCK TABLES;
 SET GLOBAL innodb_encrypt_tables = on;
 
 --echo # Wait max 10 min for key encryption threads to encrypt all spaces
+--let $tables_count= `select count(*) from information_schema.tables where engine = 'InnoDB'`
 --let $wait_timeout= 600
---let $wait_condition=SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0;
+--let $wait_condition=SELECT COUNT(*) = $tables_count FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0
 --source include/wait_condition.inc
 
 --sorted_result