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.
Alternatives for testing intro point rotation include:
* Using shadow to "fast forward" time
* Overriding the consensus parameters hs_intro_min_lifetime and
hs_intro_max_lifetime.
Fixes#40922
