Add support to filter by specific workflows for GitHub Actions

[Fryguy]

When filtering by a branch you get the results of all workflows, however we only really want to see the one workflow we have for CI. Our other workflows like packaging and linting take much less time, run at a different cadence, and aren't as important to us from a graph perspective. With those included, what happens is we have tall spikes mixed with short spikes, and is included in values like "average time".