flakefinder: live filtering in report - exclude lane

[dhiller]

Is your feature request related to a problem? Please describe:
Whenever there's a clustered failure, this pollutes the entire view,so we aren't able to see other flakes.

source 1

Describe the solution you'd like:

We want a checkbox that excludes the test lane on the fly so that we can concentrate on other flakes when we are looking at the report.

Describe alternatives you've considered:

Additional context:

Similar features do exist in the flake-stats report 2, there we do live filtering of rows. We also have a similar feature in the test overview report 3

/area flakefinder