New & old remembered sets

[PalumboN]

Now we have 2 remembered sets:

• NewSpaceRememberedSet: Saving objects (from old or perm space) with references to new space's objects.
• OldSpaceRememberedSet: Saving objects (from perm space) with references to old space's objects.

And:

• OldSpaceRememberedSet are used as roots on fullGC.
• There are changes on each store:
  • New check added for new remembered set
  • On each check, maybe the remembered set is iterated
  • CHECK IF WE NEED TO IMPROVE THIS

[PalumboN]

Failing tests are from JIT, they are already broken on permSpace branch

[PalumboN]

⚠️ New check added for each store. Maybe can be inside previous if to avoid double check every time?.

[PalumboN]

⚠️ Now isRemembered boolean is not enough because you don't know in which remembered set is. And is possible for an object to be in both.

We should measure if this affect performance and maybe improve the strategy.