chore(smoketests): run local browser tests on the CI runner

[KishanPRao]

Summary

Smoketests run on a browser installed on the runner, across Chrome, Firefox and Safari, in addition to Sauce.

Changes

• smoketests/wdio.local.conf.ts: local wdio config, no Sauce service or credentials, browser picked with SMOKETESTS_BROWSER, single session for Safari.
• smoketests/tests/wdio/react/tests.ts: wait for a terminal status, the app starts at waiting so the old wait returned before submission started.
• smoketests/package.json, package.json: add wdio:local, start:wdio:local, smoketest:browser:local.
• smoketests/tsconfig.json: typecheck the new config.
• .github/actions/smoke-tests/action.yml: add browser-runner and browser inputs, enable safaridriver for Safari, make Sauce credentials optional.
• .github/workflows/test.yml: move browser smoke out of test_linux_all into smoke_browser_local, add smoke_browser_sauce on manual dispatch, add the workflow_dispatch trigger.

Note

Safari needs safaridriver --enable first, so the action runs it before the Safari job. Sauce is run on-demand until the tunnel configuration is sorted.

ref: BT-7478