Enable remote bazel cache

Re-enable the remote bazel cache based on the updated information on eclipsefdn/helpdesk#4315 (comment 2245071)

There is an issue that when multi access to the same bazel cached folder, build system crashes. Since the cache has improved the performance a lot, change back to one build agent.

CI:https://ci.eclipse.org/openpass/job/GT-Gen-Simulator-PreMerge-Gate/view/change-requests/job/MR-29/