Allow query tagging for Snowflake source

[jmmizerany]

Is your feature request related to a problem? Please describe.
We use Cube to connect to Snowflake as a source, and need to track the performance of queries running inside of Snowflake. An issue we are running into is our BI tools that connect to cube to write query tags in the format of

/*
{...}
*/

but when rewriting in cube happens this is removed

Describe the solution you'd like
Ideally we would like to be able to pass those query tags from BI tools through cube into Snowflake so we can track performance, or have some way in cube to write query tags

[github-actions]

If you are interested in working on this issue, please go ahead and provide PR for that.
We'd be happy to review it and merge it.
If this is the first time you are contributing a Pull Request to Cube, please check our contribution guidelines.
You can also post any questions while contributing in the #contributors channel in the Cube Slack.