MDEV-33751 Assertion `thd' failed in int temp_file_size_cb_func(tmp_file_tracking*, int)

Changes:
- Fixed that MyISAM and Aria parallel repair works with tmp file limit.
  This required to add current_thd to all parallel workers and add
  protection in my_malloc_size_cb_func() and temp_file_size_cb_func() to
  be able to handle shared THD's.  I removed the old code in MyISAM to
  set current_thd() as only worked when using with virtal indexed
  columns and I wanted to keep the Aria and MyISAM code identical.

Other things:
- Improved error messages from Aria parallel repair and
  create_internal_tmp_table_from_heap().

include/myisamchk.h

@@ -113,9 +113,9 @@ typedef struct st_handler_check_param
   uint progress_counter;             /* How often to call _report_progress() */
   ulonglong progress, max_progress;
 
-  void (*init_fix_record)(void *);
   int (*fix_record)(struct st_myisam_info *info, uchar *record, int keynum);
-
+  void (*init_repair_thread)(void *);
+  void *init_repair_thread_arg;
   mysql_mutex_t print_msg_mutex;
   my_bool need_print_msg_lock;
   myf malloc_flags;