## Summary

Migrate synthetics based SLO plugin tests to scout  !!

### How to test locally

If you want to try it out locally here are the commands:

Start the server

```bash
// ESS
node scripts/scout.js start-server --stateful

// Serverless
node scripts/scout.js start-server --serverless=[es|oblt|security]
```

Then run in another terminal:

```bash
// ESS
npx playwright test --config x-pack/solutions/observability/plugins/slo/test/scout/ui/playwright.config.ts --project=local --grep @ess

// Serverless
npx playwright test --config x-pack/solutions/observability/plugins/slo/test/scout/ui/playwright.config.ts --project=local --grep @svlOblt
```

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Francesco Fagnani <francesco.fagnani@elastic.co>
Co-authored-by: Dzmitry Lemechko <dzmitry.lemechko@elastic.co>
Co-authored-by: Panagiota Mitsopoulou <giota85@gmail.com>
Co-authored-by: Francesco Fagnani <fagnani.francesco@gmail.com>
(cherry picked from commit 726042c)

# Conflicts:
#	.buildkite/pipelines/pull_request/slo_plugin_e2e.yml
#	.buildkite/scout_ci_config.yml
#	.buildkite/scripts/steps/functional/slo_plugin_e2e.sh
#	x-pack/solutions/observability/packages/kbn-scout-oblt/src/playwright/fixtures/parallel_run_fixtures.ts
#	x-pack/solutions/observability/packages/kbn-scout-oblt/src/playwright/fixtures/single_thread_fixtures.ts
#	x-pack/solutions/observability/packages/kbn-scout-oblt/src/playwright/fixtures/types.ts
#	x-pack/solutions/observability/packages/kbn-scout-oblt/src/playwright/fixtures/worker/index.ts
#	x-pack/solutions/observability/plugins/slo/e2e/services/slo_data_service.ts
#	x-pack/solutions/observability/plugins/slo/e2e/tsconfig.json