hs_service: don't force high intro point rotation for TestingTorNetwork

This was previously added to facilitate testing intro point rotation with chutney. However, the implementation is problematic since it forces excessive rotation whenever TestingTorNetwork is enabled, and can't be adjusted or disabled.

In case we do need to test intro point rotation again, it can still be done using shadow which can "fast forward" time. Or if we decide we need to add back this capability, it should be via individual Testing* options instead of being controlled directly by TestingTorNetwork.

Fixes #40922 (closed)