MDEV-30065: mariadb-install-db allow for --enforce-storage-engine=InnoDB

Hide the errors related to missing innodb stats tables in bootstrap mode
on the assumption that because we are in bootstrap mode they are going
to be created.

storage/innobase/dict/dict0dict.cc

@@ -5646,14 +5646,14 @@ dict_table_schema_check(
 		/* no such table */
 
 		if (innobase_strcasecmp(req_schema->table_name, "mysql/innodb_table_stats") == 0) {
-			if (innodb_table_stats_not_found_reported == false) {
+			if (innodb_table_stats_not_found_reported == false && !opt_bootstrap) {
 				innodb_table_stats_not_found = true;
 				innodb_table_stats_not_found_reported = true;
 			} else {
 				should_print = false;
 			}
 		} else if (innobase_strcasecmp(req_schema->table_name, "mysql/innodb_index_stats") == 0 ) {
-			if (innodb_index_stats_not_found_reported == false) {
+			if (innodb_index_stats_not_found_reported == false && !opt_bootstrap) {
 				innodb_index_stats_not_found = true;
 				innodb_index_stats_not_found_reported = true;
 			} else {

storage/innobase/dict/dict0stats.cc

@@ -3293,7 +3293,8 @@ dict_stats_update(
 			or is corrupted, calculate the transient stats */
 
 			if (innodb_table_stats_not_found == false &&
-			    table->stats_error_printed == false) {
+			    table->stats_error_printed == false &&
+			    !opt_bootstrap) {
 				ib::error() << "Fetch of persistent statistics"
 					" requested for table "
 					<< table->name