Move spaces tests from Puppeteer to Cypress (#8645)

* Move spaces tests from Puppeteer to Cypress

* Add missing fixture

* Tweak synapsedocker to not double error on a docker failure

* Fix space hierarchy loading race condition

Fixes https://github.com/matrix-org/element-web-rageshakes/issues/10345

* Fix race condition when creating public space with url update code

* Try Electron once more due to perms issues around clipboard

* Try set browser permissions properly

* Try to enable clipboard another way

* Try electron again

* Try electron again again

* Switch to built-in cypress feature for file uploads

* Mock clipboard instead

* TMPDIR ftw?

* uid:gid pls

* Clipboard tests can now run on any browser due to mocking

* Test Enter as well as button for space creation

* Make the test actually work

* Update cypress/support/util.ts

Co-authored-by: Eric Eastwood <erice@element.io>

Co-authored-by: Eric Eastwood <erice@element.io>

.github/workflows/element-build-and-test.yaml

@@ -71,6 +71,7 @@ jobs:
           # to run the tests, so use chrome.
           browser: chrome
           start: npx serve -p 8080 webapp
+          wait-on: 'http://localhost:8080'
           record: true
           command-prefix: 'yarn percy exec --'
         env:
@@ -83,6 +84,8 @@ jobs:
           PERCY_BROWSER_EXECUTABLE: /usr/bin/chromium-browser
           # pass GitHub token to allow accurately detecting a build vs a re-run build
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # make Node's os.tmpdir() return something where we actually have permissions
+          TMPDIR: ${{ runner.temp }}
 
       - name: Upload Artifact
         if: failure()