[feature request] Support custom review comment tag

[bugale]

Currently, Lintly uses the same tag for all comments. This means that if you want to run several linters, with several runs of Lintly, the second run deletes the comments of the first one.
This can be solved by adding support to not delete old comments, then use it on all runs except the first one, but to better allow Lintly to run concurrently on several linters, it would be much nicer to have control over the tag by which Lintly deletes comments, having different tags for different runs,