## Changes
As of the clusters API v2.1 the results include system clusters. On
large workspaces this can lead to long load times and include many
irrelevant results. The cluster picker should only show interactive
clusters.
Also see #1754.
## Tests
Manually confirmed the picker runs fast on a large workspace.
## Changes
Enable gofumpt and goimports in golangci-lint and apply autofix.
This makes 'make fmt' redundant, will be cleaned up in follow up diff.
## Tests
Existing tests.
## Changes
Only clusters with their source attribute equal to `UI` or `API` should
be presented in the dropdown.
## Tests
Unit test and manual confirmation.
Pieter Noordhuis
Denis Bilenko
Andrew Nester
Serge Smertin