Tweaks to CI (#33014)

* Tweak github actions to make Sonar & zizmor happier

* Apply filters on some pnpm install calls

* Remove stale setup-python step

* Add missing needs in complete job

* Remove repository_dispatch for everything bar develop CD

js-sdk now runs the tests downstream so this was unnecessary

* Fix prepare desktop for tests in merge queue

* Iterate

* Iterate

* Iterate

* Discard changes to .github/workflows/build_desktop_linux.yaml

* Discard changes to .github/workflows/build_desktop_macos.yaml

.github/workflows/tests.yml

@@ -5,8 +5,6 @@ on:
         types: [checks_requested]
     push:
         branches: [develop, master]
-    repository_dispatch:
-        types: [element-web-notify]
     workflow_call:
         inputs:
             disable_coverage: