[CI] Use 'list' Playwright reporter

When running the tests locally, the current 'html' reporter is fine.
But I've bveen confused with it in CI logs where the was a failure,
presumably a silent retry and finally a report of the tests passing.

I think in CI we would have more clarity with an alternate reporter.
Let's try 'list'. If it does not work well we can fall-back on the
simple 'dot'.

Signed-off-by: Marc Dumais <marc.dumais@ericsson.com>

playwright.config.ts

@@ -14,7 +14,7 @@ export default defineConfig({
   /* Opt out of parallel tests on CI. */
   workers: process.env.CI ? 1 : undefined,
   /* Reporter to use. See https://playwright.dev/docs/test-reporters */
-  reporter: 'html',
+  reporter: process.env.CI ? 'list' : 'html',
   /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
   use: {
     /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */