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

devenv/docker/loadtest-ts/package.json

@@ -0,0 +1,28 @@
+{
+  "private": true,
+  "license": "Apache-2.0",
+  "name": "@grafana/perf-tests",
+  "version": "9.3.0-pre",
+  "devDependencies": {
+    "@babel/core": "7.19.0",
+    "@babel/plugin-proposal-class-properties": "7.18.6",
+    "@babel/plugin-proposal-object-rest-spread": "7.18.9",
+    "@babel/preset-env": "7.19.0",
+    "@babel/preset-typescript": "7.18.6",
+    "@types/k6": "0.39.0",
+    "@types/shortid": "0.0.29",
+    "@types/webpack": "5.28.0",
+    "babel-loader": "8.2.5",
+    "shortid": "2.2.16",
+    "ts-node": "10.9.1",
+    "typescript": "4.8.2",
+    "webpack": "5.74.0",
+    "webpack-cli": "4.10.0",
+    "webpack-glob-entries": "1.0.1"
+  },
+  "scripts": {
+    "build": "webpack",
+    "prepare-testdata": "yarn run prepare-testdata:object-store-test",
+    "prepare-testdata:object-store-test": "ts-node scripts/prepareDashboardFileNames.ts ../../dev-dashboards ./scripts/tmp/filenames.json"
+  }
+}