MDEV-27314 Condense innodb buffer pool resize message

InnoDB buffer pool resize messages are more succinct from this change:

Before:
```
2022-05-07 17:10:33 0 [Note] InnoDB: Completed resizing buffer pool from 14745600 to 19660800 bytes.
2022-05-07 17:10:33 0 [Note] InnoDB: Completed resizing buffer pool.
2022-05-07 17:10:33 8 [Note] InnoDB: Completed resizing buffer pool. (New size: 19660800 bytes).
```
After:
```
2022-05-07 17:10:33 0 [Note] InnoDB: Completed resizing buffer pool from 14745600 to 19660800 bytes.
```

Additionally, the INNODB_BUFFER_POOL_RESIZE_STATUS has more complete
info: it contains both the old and new buffer pool size values.

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

@@ -7,7 +7,7 @@
 
 let $wait_timeout = 180;
 let $wait_condition =
-  SELECT SUBSTR(variable_value, 1, 31) = 'Completed resizing buffer pool.'
+  SELECT SUBSTR(variable_value, 1, 30) = 'Completed resizing buffer pool'
   FROM information_schema.global_status
   WHERE LOWER(variable_name) = 'innodb_buffer_pool_resize_status';
 

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

@@ -15,7 +15,7 @@ SET GLOBAL innodb_buffer_pool_size=8388608;
 
 let $wait_timeout = 60;
 let $wait_condition =
-  SELECT SUBSTR(variable_value, 1, 31) = 'Completed resizing buffer pool.'
+  SELECT SUBSTR(variable_value, 1, 30) = 'Completed resizing buffer pool'
   FROM information_schema.global_status
   WHERE variable_name = 'INNODB_BUFFER_POOL_RESIZE_STATUS';
 --source include/wait_condition.inc

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

@@ -8,7 +8,7 @@
 
 let $wait_timeout = 180;
 let $wait_condition =
-  SELECT SUBSTR(variable_value, 1, 31) = 'Completed resizing buffer pool.'
+  SELECT SUBSTR(variable_value, 1, 30) = 'Completed resizing buffer pool'
   FROM information_schema.global_status
   WHERE LOWER(variable_name) = 'innodb_buffer_pool_resize_status';
 

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

@@ -93,7 +93,7 @@ DROP TABLE tr,tc,td;
 
 let $wait_timeout = 180;
 let $wait_condition =
-  SELECT SUBSTR(variable_value, 1, 31) = 'Completed resizing buffer pool.'
+  SELECT SUBSTR(variable_value, 1, 30) = 'Completed resizing buffer pool'
   FROM information_schema.global_status
   WHERE LOWER(variable_name) = 'innodb_buffer_pool_resize_status';
 

mysql-test/suite/sys_vars/t/innodb_buffer_pool_size_basic.test

@@ -25,7 +25,7 @@
 --source include/have_innodb.inc
 
 let $wait_condition =
-  SELECT SUBSTR(variable_value, 1, 31) = 'Completed resizing buffer pool.'
+  SELECT SUBSTR(variable_value, 1, 30) = 'Completed resizing buffer pool'
   FROM information_schema.global_status
   WHERE LOWER(variable_name) = 'innodb_buffer_pool_resize_status';
 

storage/innobase/buf/buf0buf.cc

@@ -1933,9 +1933,8 @@ inline void buf_pool_t::resize()
 
 	if (srv_buf_pool_old_size != srv_buf_pool_size) {
 
-		ib::info() << "Completed resizing buffer pool from "
-			<< srv_buf_pool_old_size
-			<< " to " << srv_buf_pool_size << " bytes.";
+	        buf_resize_status("Completed resizing buffer pool from %zu to %zu bytes."
+			    ,srv_buf_pool_old_size, srv_buf_pool_size);
 		srv_buf_pool_old_size = srv_buf_pool_size;
 	}
 
@@ -1947,11 +1946,8 @@ inline void buf_pool_t::resize()
 	}
 #endif /* BTR_CUR_HASH_ADAPT */
 
-	if (!warning) {
-		buf_resize_status("Completed resizing buffer pool.");
-	} else {
+	if (warning)
 		buf_resize_status("Resizing buffer pool failed");
-	}
 
 	ut_d(validate());
 

storage/innobase/handler/ha_innodb.cc

@@ -17419,9 +17419,6 @@ innodb_buffer_pool_size_update(THD*,st_mysql_sys_var*,void*, const void* save)
 		"Buffer pool resize requested");
 
 	buf_resize_start();
-
-	ib::info() << export_vars.innodb_buffer_pool_resize_status
-		<< " (New size: " << in_val << " bytes).";
 }
 
 /** The latest assigned innodb_ft_aux_table name */