Make extendedGaugeResident up to date with gaugePrecise.

[SaltyChiang]

Update extendedGaugeResident if gaugePrecise is modified. I add a function to do the work. After this change, we should expect that extendedGaugeResident is always the extended version of gaugePrecise.

Testings are required, hopefully CI/CD will do this for us.

[maddyscientist]

@weinbe2 can you test this with MILC when you get the chance please?

[maddyscientist]

cscs-ci run

[weinbe2]

Finally testing this, sorry for the hold-up @SaltyChiang . This technically needs develop merged in as well as a clang-format, plus some doxygen, but for simplicity I can also take care of that with one of my outstanding PR efforts...

[weinbe2]

There's a small correctness issue somewhere that I'm seeing running MILC RHMC, namely the fermion contribution to the action at the very start of the evolution disagrees relative to develop. The gauge action and the momentum action contributions are fine at the start, but then also deviate later in the evolution.

I'll have to dig further into this and try to understand what's going awry...

[SaltyChiang]

Thank you very much for the testing @weinbe2. I'll test the RHMC algorithm on my side.