Feat: Support for "Update" type queries in Templated Benchmarks

[ETHenzlere]

Feature adds a check for UPDATE style queries and handles the execution in templated benchmarks

[anjagruenheid]

LGTM, make it public and ask Brian for a review.

[ETHenzlere]

@bpkroth could you give me a review for this PR?

[bpkroth]

This is kind of a weird double loop.

There should never be any more results for INSERT/UPDATE/DELETE, correct?
So, you really don't need to outer loop with a break. Just the if hasResultSet and then loop inside that?

[bpkroth]

Maybe just add an assert inside the INSERT/UPDATE/DELETE branch that it doesn't have more results and remove the outer loop.

[ETHenzlere]

The way I understand it, we can theoretically have a statement with multiple queries (select * from x; select * from y) which would return multiple result sets. And they could theoretically also get mixed with "update" type queries.
The question is whether we want to only support this for "select" type queries, all possible combinations or we do not want to support this at all

I have currently adapted such that only a combination of "select" type queries would be supported

[bpkroth]

Fixed some small whitespace issues. LGTM now. Thanks for the contribution!