* [monorepo] fix downloads from non-sharded clsi-cache
* [web] check some compile from cache options server-side
* [web] integrate clsi-cache into download pdf from project dashboard
* [web] remove frontend tests for server-side validation
* [web] remove unused fetch mock
* [web] use helper that adds polyfill for AbortSignal.any()
* [web] upgrade fetch-mock to fix leaking AbortSignal
* [web] do not add an extra timeout to clsi-cache request
The web backend service has a low timeout already.
GitOrigin-RevId: a90984b92f5d4f24005db5a09f2c5d2424436886
