MDEV-31005: Make working cursor-protocol

Updated tests: cases with bugs or which cannot be run
with the cursor-protocol were excluded with
"--disable_cursor_protocol"/"--enable_cursor_protocol"

Fix for v.11.5

mysql-test/suite/innodb/t/innodb_buffer_pool_load_now.test

@@ -90,10 +90,12 @@ WHERE table_name = '`test`.`ib_bp_test`';
 # Load the table so that entries in the I_S table do not appear as NULL
 select count(*) from ib_bp_test LIMIT 0;
 
+--disable_cursor_protocol
 # Check that async reads are executed during bufferpool load
 select variable_value into @innodb_async_reads_total_count_before
  from information_schema.global_status
  where variable_name='innodb_async_reads_total_count';
+--enable_cursor_protocol
 
 # Load
 SET GLOBAL innodb_buffer_pool_load_now = ON;

mysql-test/suite/innodb/t/page_cleaner.test

@@ -14,9 +14,11 @@ WHERE variable_name = 'INNODB_BUFFER_POOL_PAGES_DIRTY';
 --source include/wait_condition.inc
 
 SET GLOBAL innodb_max_dirty_pages_pct=90.0;
+--disable_cursor_protocol
 select variable_value into @innodb_async_writes_total_count_before
  from information_schema.global_status
  where variable_name='innodb_async_writes_total_count';
+--enable_cursor_protocol
 
 CREATE TABLE t ENGINE=InnoDB SELECT * FROM seq_1_to_10000;