CI occasionaly segfaults in main.mysqladmin on amd64-msan-clang-20

CURRENT_TEST: main.mysqladmin

mysqltest: In included file "./include/shutdown_mysqld.inc": 

[...]

At line 47: query 'shutdown_server $server_shutdown_timeout' failed: <Unknown> (2013): Lost connection to server during query

The result from queries just before the failure was:

< snip >

# Bug#58221 : mysqladmin --sleep=x --count=x keeps looping

#

# Executing mysqladmin with --sleep=1 and --count=2.

# Done.

# Displaying the output :

mysqld is alive

mysqld is alive

#

# BUG#11766184 - 59234: cmdline clients crash --defaults-extra-file

#                with no .cnf or .ini extension.

#

# Creating an empty file 'cnf_file'

# Using --defaults-extra-file option with 'cnf_file'.

mysqld is alive

[...]

Program terminated with signal SIGSEGV, Segmentation fault.