MDEV-25004 restart_bindir option to restart server from different location

Adds new parameter $restart_bindir for restart_mysqld.inc.

Example:

let $restart_bindir= /home/midenok/src/mariadb/10.3b/build;
--source include/restart_mysqld.inc

It is good to return back original server before check_mysqld will be
run at the test end:

let $restart_bindir=;
--source include/restart_mysqld.inc

mysql-test/include/start_mysqld.inc

@@ -1,13 +1,44 @@
 # Include this script only after using shutdown_mysqld.inc
 # where $_expect_file_name was initialized.
 # Write file to make mysql-test-run.pl start up the server again
+
+# restart_noprint defines how much is printed to the .result file
+# if 0 (default) then '# result' and restart_parameters are printed
+# if 1 then print #result but not the content of restart_parameters
+# if 2 then nothing is printed
+
+if (!$restart_noprint)
+{
+  --let $restart_noprint= 2
+}
+
+--let $restart_cmd= restart
+
+if ($restart_bindir)
+{
+  --let $restart_cmd= restart_bindir $restart_bindir
+}
+
 if ($restart_parameters)
 {
-  --exec echo "restart: $restart_parameters" > $_expect_file_name
+  --exec echo "$restart_cmd: $restart_parameters" > $_expect_file_name
+  if (!$restart_noprint)
+  {
+    --replace_result $MYSQL_TEST_DIR MYSQL_TEST_DIR $MYSQLTEST_VARDIR MYSQLTEST_VARDIR 
+    --exec echo "# $restart_cmd: $restart_parameters"
+  }
+  if ($restart_noprint == 1)
+  {
+    --exec echo "# $restart_cmd: with restart_parameters"
+  }
 }
 if (!$restart_parameters)
 {
-  --exec echo "restart" > $_expect_file_name
+  --exec echo "$restart_cmd" > $_expect_file_name
+  if ($restart_noprint < 2)
+  {
+    --exec echo "# $restart_cmd"
+  }
 }
 
 # Turn on reconnect
@@ -18,4 +49,3 @@ if (!$restart_parameters)
 
 # Turn off reconnect again
 --disable_reconnect
-

mysql-test/mysql-test-run.pl

@@ -1963,7 +1963,7 @@ sub collect_mysqld_features_from_running_server ()
 
 sub find_mysqld {
 
-  my ($mysqld_basedir)= $ENV{MTR_BINDIR}|| @_;
+  my ($mysqld_basedir)= $ENV{MTR_BINDIR_FORCED} || $ENV{MTR_BINDIR} || @_;
 
   my @mysqld_names= ("mysqld", "mysqld-max-nt", "mysqld-max",
 		     "mysqld-nt");
@@ -1974,7 +1974,7 @@ sub find_mysqld {
     unshift(@mysqld_names, "mysqld-debug");
   }
 
-  return my_find_bin($bindir,
+  return my_find_bin($mysqld_basedir,
 		     ["sql", "libexec", "sbin", "bin"],
 		     [@mysqld_names]);
 }
@@ -4789,6 +4789,7 @@ sub check_expected_crash_and_restart {
         mtr_verbose("Test says wait before restart") if $waits == 0;
         next;
       }
+      delete $ENV{MTR_BINDIR_FORCED};
 
       # Ignore any partial or unknown command
       next unless $last_line =~ /^restart/;
@@ -4796,7 +4797,13 @@ sub check_expected_crash_and_restart {
       # extra command line options to add to the restarted mysqld.
       # Anything other than 'wait' or 'restart:' (with a colon) will
       # result in a restart with original mysqld options.
-      if ($last_line =~ /restart:(.+)/) {
+      if ($last_line =~ /restart_bindir\s+(\S+)(:.+)?/) {
+        $ENV{MTR_BINDIR_FORCED}= $1;
+        if ($2) {
+          my @rest_opt= split(' ', $2);
+          $mysqld->{'restart_opts'}= \@rest_opt;
+        }
+      } elsif ($last_line =~ /restart:(.+)/) {
         my @rest_opt= split(' ', $1);
         $mysqld->{'restart_opts'}= \@rest_opt;
       } else {