[monorepo] add workaround for flaky mongo db init (#27833)
* [monorepo] add workaround for flaky mongo db init
Upstream issue: https://github.com/docker-library/mongo/issues/730
Upstream PR: https://github.com/docker-library/mongo/pull/731
* [server-ce] revert entrypoint changes
* [monorepo] fix typo in path
* [server-ce] run E2E tests from internal monorepo in cloudbuild
* [monorepo] avoid repeated changes to mongo entrypoint
GitOrigin-RevId: 617db9caee1600c8a506a7a147723a306e57ded3