Fixup MDEV-21429: Correct a definition

INNOBASE_ALTER_NOVALIDATE: Remove the set of operations
INNOBASE_ONLINE_CREATE that was accidentally included in the
definition.

In the merge of 82187a12 to 10.3
(in commit eda71979) the flags
were defined correctly.

This bug was caught by the test innodb_zip.index_large_prefix.

storage/innobase/handler/handler0alter.cc

@@ -103,8 +103,7 @@ static const Alter_inplace_info::HA_ALTER_FLAGS INNOBASE_FOREIGN_OPERATIONS
 
 /** Operations that InnoDB cares about and can perform without validation */
 static const Alter_inplace_info::HA_ALTER_FLAGS INNOBASE_ALTER_NOVALIDATE
-	= INNOBASE_ONLINE_CREATE
-	| INNOBASE_FOREIGN_OPERATIONS
+	= INNOBASE_FOREIGN_OPERATIONS
 	| Alter_inplace_info::DROP_INDEX
 	| Alter_inplace_info::DROP_UNIQUE_INDEX
 	| Alter_inplace_info::ALTER_COLUMN_NAME
@@ -115,6 +114,7 @@ static const Alter_inplace_info::HA_ALTER_FLAGS INNOBASE_ALTER_NOVALIDATE
 /** Operations that InnoDB cares about and can perform without rebuild */
 static const Alter_inplace_info::HA_ALTER_FLAGS INNOBASE_ALTER_NOREBUILD
 	= INNOBASE_ALTER_NOVALIDATE
+	| INNOBASE_ONLINE_CREATE
 	| Alter_inplace_info::ALTER_COLUMN_EQUAL_PACK_LENGTH
 	| Alter_inplace_info::ADD_VIRTUAL_COLUMN;