Storage: k6 tests (#57496)

* object store k6

* update script

* refactor

* rename scripts

* fix paths

* fixes

* fix client - check connected state

* add teardown timeout

* rename to grpc object store client

* fail if health check fails

* abort rather than fail

* stale import

* create `run.sh`

* adjust for dummy server

* fix mkdir

* clean up dependencies

* remove name and version

* bring back name and version!

* remove clean webpackk plugin

* remove copy plugin

* update yarn lock

* remove stale import

* update yarn lock

* move perf tests to devenv/docker/loadtest-ts

* add codeownres

.github/CODEOWNERS

@@ -46,6 +46,9 @@ go.sum @grafana/backend-platform
 /devenv/docker/blocks/loki* @grafana/observability-logs
 /devenv/docker/blocks/elastic* @grafana/observability-logs
 
+# Performance tests
+/devenv/docker/loadtests-ts @grafana/grafana-edge-squad
+
 # Continuous Integration
 .drone.yml @grafana/grafana-release-eng
 .drone.star @grafana/grafana-release-eng