MDEV-8501: encryption.create_or_replace fails in buildbot on P8 builders

Analysis: There is race between drop table and encryption threads that
could cause encryption thread to enter mutex that has been already
released.

Fix: When destroying crypt_data first enter the mutex and set crypt data
unavailable, then release the memory and clean up the data. This should
make the race more unprobable. Additionally, added big_test for
create_or_replace as it could fail testcase timeout
if you have slow I/O (tested that testcase passes with --mem).

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

 --source include/have_innodb.inc
 --source include/have_file_key_management_plugin.inc
 --source include/not_embedded.inc
+# This is needed for longer testcase timeout at least P7/P8
+--source include/big_test.inc
 
 #
 # MDEV-8164: Server crashes in pfs_mutex_enter_func after fil_crypt_is_closing or alike

storage/innobase/fil/fil0crypt.cc

@@ -364,7 +364,13 @@ fil_space_destroy_crypt_data(
 	fil_space_crypt_t **crypt_data)	/*!< out: crypt data */
 {
 	if (crypt_data != NULL && (*crypt_data) != NULL) {
-		mutex_free(& (*crypt_data)->mutex);
+		/* Make sure that this thread owns the crypt_data
+		and make it unawailable, this does not fully
+		avoid the race between drop table and crypt thread */
+		mutex_enter(&(*crypt_data)->mutex);
+		(*crypt_data)->inited = false;
+		mutex_exit(&(*crypt_data)->mutex);
+		mutex_free(&(*crypt_data)->mutex);
 		memset(*crypt_data, 0, sizeof(fil_space_crypt_t));
 		free(*crypt_data);
 		(*crypt_data) = NULL;

storage/xtradb/fil/fil0crypt.cc

@@ -364,6 +364,12 @@ fil_space_destroy_crypt_data(
 	fil_space_crypt_t **crypt_data)	/*!< out: crypt data */
 {
 	if (crypt_data != NULL && (*crypt_data) != NULL) {
+		/* Make sure that this thread owns the crypt_data
+		and make it unawailable, this does not fully
+		avoid the race between drop table and crypt thread */
+		mutex_enter(&(*crypt_data)->mutex);
+		(*crypt_data)->inited = false;
+		mutex_exit(&(*crypt_data)->mutex);
 		mutex_free(& (*crypt_data)->mutex);
 		memset(*crypt_data, 0, sizeof(fil_space_crypt_t));
 		free(*crypt_data);