Use LSA to determine console users on Windows

[RebeccaMahany]

Benchmarking our current implementation against qusers and using LSA showed that using LSA is the most performant option for us:

(becca/consoleusers-alternatives-evaluate)
$ go test -v -bench=.
=== RUN   TestCurrentUids
=== PAUSE TestCurrentUids
=== CONT  TestCurrentUids
--- PASS: TestCurrentUids (0.01s)
goos: windows
goarch: amd64
pkg: github.com/kolide/launcher/ee/consoleuser
cpu: 12th Gen Intel(R) Core(TM) i5-1235U
BenchmarkCurrentUids
BenchmarkCurrentUids-12                      100          10311775 ns/op        18467225 B/op       1791 allocs/op
BenchmarkCurrentUidsViaQuser
BenchmarkCurrentUidsViaQuser-12               76          13532111 ns/op           36786 B/op        281 allocs/op
BenchmarkCurrentUidsViaLsa
BenchmarkCurrentUidsViaLsa-12               1974            694522 ns/op            5920 B/op         81 allocs/op
PASS
ok      github.com/kolide/launcher/ee/consoleuser       4.110s

Requires kolide/go-winlsa#2.

[directionless]

I think we should fork winlsa before merging

[directionless]

Is this just map.Keys?

[directionless]

I guess thats an iter. Not sure if it would just work though

[zackattack01]

updated!

[directionless]

I wonder if we could have changed the signature to iter, instead of bringing in slices.Collect, but sure.