Adapt to mssql-docker breaking change

[greg0ire]

2 things need to change:

• the path to the binary, which is now secure by default;
• the addition of the -C flag, telling sqlcmd to trust the certificate of the server.

Quote from the documentation:

In SQL Server 2022 (16.x) CU 14 and later versions, container images
include the new mssql-tools18 package. The previous directory
/opt/mssql-tools/bin is being phased out. The new directory for
Microsoft ODBC 18 tools is /opt/mssql-tools18/bin, aligning with the
latest tools offering. For more information about changes and security
enhancements, see https://techcommunity.microsoft.com/t5/sql-server-blog/odbc-driver-18-0-for-sql-server-released/ba-p/3169228

See microsoft/mssql-docker#892

[derrabus]

Thank you!