Update-Database --help shows wrong usage information

[TheBoardMan]

When performing an update-database, I wanted to use a connection different from the default. In order to discover the option to use, I run "update-database --help". This reported the option to use as --connection <CONNECTION>. This, however, didn't work. The answer I found in issue #22390: The option should be -Connection <CONNECTION>.

This basically solved my problem.

Issue #31218, referring to the aforementioned issue, is quite similar.

Now the point of this issue report is that the help should report the correct parameters, with single dashes instead of double.

[Using EF core tools v9.0.9]

[AndriySvyryd]

This would be fixed by switching to System.CommandLine (#18840)