fix(#137): changes priorityFeeGrowth to invariantGrowth, removes from…

[Alexangelj]

… claim

Description

• Closes Priority fee growth based on liquidity shares and paid in WETH #137 by removing the WETH accrual of "priorityFeeGrowth" rewards from swap and claim.
• Updates feePriorityGrowth to invariantGrowth, updating all respective names.
• Adds an argument and return variable to HyperLib.syncPositionFees to sync the invariantGrowth exactly like the fee buckets.
• Adds a conditional piece of logic to _swap to increase the invariantGrowth if the pool controller called the swap, and the change in the invariant was greater than zero. The actual check is not greater than, it's not equal to zero. This is because it's a cheaper check, and also because a decreasing invariant will be reverted by the previous logic.
• Adds an invariant growth swap test to HyperTestSwap.