Cleanup: Remove the error code DB_MUST_GET_MORE_FILE_SPACE

Ever since MDEV-24589, MDEV-18518 and other recent changes corrected the
rollback of CREATE and DROP operations, there is no need to crash the
server if we run out of space during a DROP operation. We can simply
let the transaction be rolled back.

mysql-test/suite/innodb/r/innodb-wl5522-debug.result

@@ -453,7 +453,7 @@ restore: t1 .ibd and .cfg files
 SET SESSION debug_dbug=@saved_debug_dbug;
 SET SESSION debug_dbug="+d,ib_import_open_tablespace_failure";
 ALTER TABLE t1 IMPORT TABLESPACE;
-ERROR HY000: Got error 43 'Tablespace not found' from ./test/t1.ibd
+ERROR HY000: Got error 42 'Tablespace not found' from ./test/t1.ibd
 SET SESSION debug_dbug=@saved_debug_dbug;
 restore: t1 .ibd and .cfg files
 SET SESSION debug_dbug="+d,ib_import_check_bitmap_failure";
@@ -922,7 +922,7 @@ ERROR HY000: Tablespace has been discarded for table `t1`
 restore: t1 .ibd and .cfg files
 SET SESSION debug_dbug="+d,dict_tf_to_fsp_flags_failure";
 ALTER TABLE t1 IMPORT TABLESPACE;
-ERROR HY000: Got error 38 'Data structure corruption' from ./test/t1.ibd
+ERROR HY000: Got error 37 'Data structure corruption' from ./test/t1.ibd
 SET SESSION debug_dbug=@saved_debug_dbug;
 DROP TABLE t1;
 unlink: t1.ibd

mysql-test/suite/innodb_zip/r/wl5522_debug_zip.result

@@ -88,7 +88,7 @@ restore: t1 .ibd and .cfg files
 SET SESSION debug_dbug=@saved_debug_dbug;
 SET SESSION debug_dbug="+d,ib_import_open_tablespace_failure";
 ALTER TABLE t1 IMPORT TABLESPACE;
-ERROR HY000: Got error 43 'Tablespace not found' from ./test/t1.ibd
+ERROR HY000: Got error 42 'Tablespace not found' from ./test/t1.ibd
 SET SESSION debug_dbug=@saved_debug_dbug;
 restore: t1 .ibd and .cfg files
 SET SESSION debug_dbug="+d,ib_import_check_bitmap_failure";
@@ -388,7 +388,7 @@ ERROR HY000: Tablespace has been discarded for table `t1`
 restore: t1 .ibd and .cfg files
 SET SESSION debug_dbug="+d,dict_tf_to_fsp_flags_failure";
 ALTER TABLE t1 IMPORT TABLESPACE;
-ERROR HY000: Got error 38 'Data structure corruption' from ./test/t1.ibd
+ERROR HY000: Got error 37 'Data structure corruption' from ./test/t1.ibd
 SET SESSION debug_dbug=@saved_debug_dbug;
 DROP TABLE t1;
 unlink: t1.ibd

storage/innobase/dict/dict0crea.cc

@@ -1462,14 +1462,10 @@ dict_create_or_check_foreign_constraint_tables(void)
 		ut_ad(err == DB_OUT_OF_FILE_SPACE
 		      || err == DB_TOO_MANY_CONCURRENT_TRXS);
 		trx->rollback();
-
-		if (err == DB_OUT_OF_FILE_SPACE) {
-			err = DB_MUST_GET_MORE_FILE_SPACE;
-		}
+	} else {
+		trx_commit_for_mysql(trx);
 	}
 
-	trx_commit_for_mysql(trx);
-
 	row_mysql_unlock_data_dictionary(trx);
 
 	trx->free();
@@ -1552,14 +1548,10 @@ dict_create_or_check_sys_virtual()
 		ut_ad(err == DB_OUT_OF_FILE_SPACE
 		      || err == DB_TOO_MANY_CONCURRENT_TRXS);
 		trx->rollback();
-
-		if (err == DB_OUT_OF_FILE_SPACE) {
-			err = DB_MUST_GET_MORE_FILE_SPACE;
-		}
+	} else {
+		trx_commit_for_mysql(trx);
 	}
 
-	trx_commit_for_mysql(trx);
-
 	row_mysql_unlock_data_dictionary(trx);
 
 	trx->free();

storage/innobase/include/db0err.h

 /*****************************************************************************
 
 Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2015, 2018, MariaDB Corporation.
+Copyright (c) 2015, 2021, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -49,8 +49,6 @@ enum dberr_t {
 					rollback segment */
 	DB_CLUSTER_NOT_FOUND = 30,
 	DB_TABLE_NOT_FOUND,
-	DB_MUST_GET_MORE_FILE_SPACE,	/*!< the database has to be stopped
-					and restarted with more file space */
 	DB_TOO_BIG_RECORD,		/*!< a record in an index would not fit
 					on a compressed page, or it would
 					become bigger than 1/2 free space in

storage/innobase/row/row0mysql.cc

@@ -760,12 +760,6 @@ row_mysql_handle_errors(
 		trx->rollback();
 		break;
 
-	case DB_MUST_GET_MORE_FILE_SPACE:
-		ib::fatal() << "The database cannot continue operation because"
-			" of lack of space. You must add a new data file"
-			" to my.cnf and restart the database.";
-		break;
-
 	case DB_CORRUPTION:
 	case DB_PAGE_CORRUPTED:
 		ib::error() << "We detected index corruption in an InnoDB type"
@@ -3617,21 +3611,6 @@ row_drop_table_for_mysql(
 		}
 		break;
 
-	case DB_OUT_OF_FILE_SPACE:
-		err = DB_MUST_GET_MORE_FILE_SPACE;
-		trx->error_state = err;
-		row_mysql_handle_errors(&err, trx, NULL, NULL);
-
-		/* raise error */
-		ut_error;
-		break;
-
-	case DB_TOO_MANY_CONCURRENT_TRXS:
-		/* Cannot even find a free slot for the
-		the undo log. We can directly exit here
-		and return the DB_TOO_MANY_CONCURRENT_TRXS
-		error. */
-
 	default:
 		/* This is some error we do not expect. Print
 		the error number and rollback the transaction */

storage/innobase/ut/ut0ut.cc

@@ -364,8 +364,6 @@ ut_strerr(
 		return("Cluster not found");
 	case DB_TABLE_NOT_FOUND:
 		return("Table not found");
-	case DB_MUST_GET_MORE_FILE_SPACE:
-		return("More file space needed");
 	case DB_TOO_BIG_RECORD:
 		return("Record too big");
 	case DB_TOO_BIG_INDEX_COL: