Bench restore failing due to MariaDB Dump File Compatibility Change - /*!999999\- enable the sandbox mode */

Description of the issue

Restoring a backup using the bench command fails because of a MariaDB dump file compatibility change. This issue is related to a new sandbox mode introduced in recent MariaDB versions to improve security, which is not recognized by older MariaDB and MySQL clients.

Context information (for bug reports)

.SQL backup file

-- begin frappe metadata
-- [frappe]
-- version = 15.29.1
-- branch = version-15
-- end frappe metadata
-- 
/*!999999\- enable the sandbox mode */ 
-- MariaDB dump 10.19  Distrib 10.6.18-MariaDB, for debian-linux-gnu (x86_64)
--
-- Host: 127.0.0.1    Database: _86908c96efb9701a

https://mariadb.org/mariadb-dump-file-compatibility-change/

Output of bench version

frappe 15.32.0
frappe@81bf8ea000de:/workspace/development/kf-bench$ bench --version
5.22.6

Steps to reproduce the issue

1.backup erpnext site 2.Restore backup in frappe_docker bench 3.This error is thrown

Observed result

Expected result

Restore from SQL dump should work

Stacktrace / full error message

MySQL root password: 
b"ERROR at line 3: Unknown command '\\-'.\n"
Traceback (most recent call last):
  File "/workspace/development/kf-bench/apps/frappe/frappe/commands/site.py", line 291, in restore_backup
    _new_site(
  File "/workspace/development/kf-bench/apps/frappe/frappe/installer.py", line 87, in _new_site
    install_db(
  File "/workspace/development/kf-bench/apps/frappe/frappe/installer.py", line 160, in install_db
    setup_database(force, source_sql, verbose, no_mariadb_socket)
  File "/workspace/development/kf-bench/apps/frappe/frappe/database/__init__.py", line 21, in setup_database
    return frappe.database.mariadb.setup_db.setup_database(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/apps/frappe/frappe/database/mariadb/setup_db.py", line 53, in setup_database
    bootstrap_database(db_name, verbose, source_sql)
  File "/workspace/development/kf-bench/apps/frappe/frappe/database/mariadb/setup_db.py", line 70, in bootstrap_database
    import_db_from_sql(source_sql, verbose)
  File "/workspace/development/kf-bench/apps/frappe/frappe/database/mariadb/setup_db.py", line 93, in import_db_from_sql
    DbManager(frappe.local.db).restore_database(
  File "/workspace/development/kf-bench/apps/frappe/frappe/database/db_manager.py", line 87, in restore_database
    execute_in_shell(" ".join(command), check_exit_code=True, verbose=verbose)
  File "/workspace/development/kf-bench/apps/frappe/frappe/utils/__init__.py", line 484, in execute_in_shell
    raise frappe.CommandFailedError(
frappe.exceptions.CommandFailedError: Command failed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/workspace/development/kf-bench/apps/frappe/frappe/utils/bench_helper.py", line 114, in <module>
    main()
  File "/workspace/development/kf-bench/apps/frappe/frappe/utils/bench_helper.py", line 20, in main
    click.Group(commands=commands)(prog_name="bench")
  File "/workspace/development/kf-bench/env/lib/python3.11/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/env/lib/python3.11/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/env/lib/python3.11/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/env/lib/python3.11/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/env/lib/python3.11/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/env/lib/python3.11/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/env/lib/python3.11/site-packages/click/decorators.py", line 33, in new_func
    return f(get_current_context(), *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/apps/frappe/frappe/commands/__init__.py", line 29, in _func
    ret = f(frappe._dict(ctx.obj), *args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/development/kf-bench/apps/frappe/frappe/commands/site.py", line 135, in restore
    _restore(
  File "/workspace/development/kf-bench/apps/frappe/frappe/commands/site.py", line 197, in _restore
    restore_backup(
  File "/workspace/development/kf-bench/apps/frappe/frappe/commands/site.py", line 305, in restore_backup
    print(err.args[1])
          ~~~~~~~~^^^
IndexError: tuple index out of range

Additional information

frappe version 15 using frappe_docker commit c1ee06b6ef10b556bca3078fa5692dabeb8cfe65 (HEAD -> main, origin/main, origin/HEAD)

frappe / frappe_docker