Support for data test gutter icons

[alfonsoristorato]

This PR is still a work in progress and a POC, as I need to understand whether we would want this in Kotest.
The idea is:

• Because we need the test names in order to be able to run them singularly, we cannot have gutter icons for data tests, as their names are defined at runtime, at which point it is too late to run only them
• This could eventually be solved later if we create an EXCLUDE clause, so that when user clicks the gutter icon of data tests, all data tests within the spec are run, and not the others (still not ideal, but better than current impl in this PR)
• This PR is only providing the gutter icon to data tests, which in turn will run all the tests within the spec, with a proper tooltip to represent this behaviour