MDEV-23511 shutdown_server 10 times out, causing server kill at shutdown

Shutdown of mtr tests may be too impatient, esp on CI environment where
10 seconds of `arg` of `shutdown_server arg` may not be enough for the clean
shutdown to complete.

This is fixed to remove explicit non-zero timeout argument to
`shutdown_server` from all mtr tests. mysqltest computes 60 seconds default
value for the timeout for the argless `shutdown_server` command.
This policy is additionally ensured with a compile time assert.

2 files changed, 0 insertions, 0 deletions

diff --git a/libmariadb b/libmariadb
-Subproject a746c3af449a8754e78ad7971e59e79af7957cd
+Subproject ce74fd0c4009ed9f4bcbdb4a01e96c823e961dc
diff --git a/wsrep-lib b/wsrep-lib
-Subproject ae4e58ba031587039c8830f2f8ca51fa9fb7d6e
+Subproject d0255569b0154e23c5461ed13928f9b0a18008e