[All] Reduce calls to getValue

[alxbilger]

Mainly for:

• MechanicalObject::position
• SparseGridRamificationTopology::hexahedra
• SparseGridRamificationTopology::position

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Reviewers will merge this pull-request only if

• it builds with SUCCESS for all platforms on the CI.
• it does not generate new warnings.
• it does not generate new unit test failures.
• it does not generate new scene test failures.
• it does not break API compatibility.
• it is more than 1 week old (or has fast-merge label).

[alxbilger]

Note: collision pipeline must be refactored if we want to reduce the ridiculous high number of calls to getValue. Every time there is a check between two primitives, there is a getValue call to MechanicalObject::position, proximity and alarmDistance.

[alxbilger]

When running caduceus scene for 100 time steps:

Calls to updateIfDirty()	Before	After
MechanicalObject::position	2269573	515920	-77%
SparseGridRamificationTopology::hexahedra	646323	77430	-88%
SparseGridRamificationTopology::position	644268	24473	-96%
RegularGridTopology::n	19981966	10347192	-48%

[alxbilger]

[ci-build][with-all-tests]

[damienmarchal]

Note: collision pipeline must be refactored if we want to reduce the ridiculous high number of calls to getValue. Every time there is a check between two primitives, there is a getValue call to MechanicalObject::position, proximity and alarmDistance.

Will be a very funny task to do.

EDIT: CTRL+F on 'getValue()[' shows +1000 hits.

[damienmarchal]

This PR makes me think that msg_info() << "message" is in fact something like:

if(notMuted(Base*))
      info::queue << "message"

With notMuted implemented like that:

Base::noMuted() 
{ 
     f_printLog().getValue().       
}

So either we don't use msg_info in loops (which is a good idea by the way, but not easy to track and enforce in our code base) or we reduce the cost of notMuted by using internal caching of the state.

[damienmarchal]

Conflict fixed... CI pass, I switch to ready... and let @fredroy merge it ;)