@grafana/e2e: API improvements (#23079)

* Minor changes

* Fixtures path is now relative to the project directory

* URL support module now has individual exports

* Scenario context timing issues resolved

... caused by being ran synchronously, instead of as part of Cypress' asynchronous queue.

* Scenario context API now supports multiple keys per function call

* addDataSource flow accepts a config argument

… and optionally checks datasource health status

* Added readProvisions command

* Added addPanel flow

packages/grafana-e2e/cypress/plugins/extendConfig.js

@@ -12,6 +12,7 @@ module.exports = async baseConfig => {
 
   if (CWD) {
     const projectConfig = {
+      fixturesFolder: `${CWD}/cypress/fixtures`,
       integrationFolder: `${CWD}/cypress/integration`,
       screenshotsFolder: `${CWD}/cypress/screenshots`,
       videosFolder: `${CWD}/cypress/videos`,