[web] enable mongo notablescan in CI (#29501)

* [monorepo] record ERROR/FATAL log messages in junit report

* [web] put SaaS specific code behind feature flag

* [web] use split test cache for getting user assignments

The unit tests needed updating as they did not replicate any of the
 mongo filtering. The acceptance tests cover this logic.

* [web] make better use of existing indexes

* [web] avoid col-scan in tests of notifications module

* [web] remove cleanup of empty feedbacks collection

* [web] add assertion for reason of rejected request in launchpad test

* [web] add missing indexes

* [web] enable mongo notablescan

* [web] make emailNotifications tests compatible with notablescan

GitOrigin-RevId: b888f2feeb3a0e915f068ae1c4ea23ec17821221

services/web/modules/launchpad/test/acceptance/src/LaunchpadTests.mjs

@@ -67,6 +67,9 @@ describe('Launchpad', function () {
       }),
     })
     expect(badPostResponse.status).to.equal(403)
+    expect(await badPostResponse.json()).to.deep.equal({
+      message: { type: 'error', text: 'admin user already exists' },
+    })
 
     // Log in as this new admin user
     const adminUser = await UserHelper.loginUser({