Update `sqlcmd -?` response

[grrlgeek]

Talked to the docs team about how to communicate with users if they are using sqlcmd (ODBC) or sqlcmd (go-sqlcmd). The best flag we have that works in both, on all OSes, is sqlcmd "-?".

The text Usage: sqlcmd is generic and doesn't line up with what's in sqlcmd (ODBC). We would like to update this response text to:

sqlcmd: Install/Create/Query SQL Server, Azure SQL, and Tools
sqlcmd: v1.0.0
Legal docs and information: aka.ms/SqlcmdLegal
Third party notices: aka.ms/SqlcmdNotices