Rename the constants in constants.hpp/ts to be less confusing

[jeanmon]

The current agreement is to essentially rename constants with prefix KERNEL_XXX_LENGTH into MAX_XXX_PER_TX and the non-kernel ones NEW_XXX_LENGTH by MAX_XXX_PER_CALL.
For nullifiers related constants, this gives us:

MAX_NEW_NULLIFIERS_PER_TX
MAX_NEW_NULLIFIERS_PER_CALL

### Tasks
- [ ] https://github.com/AztecProtocol/aztec-packages/issues/962

[jeanmon]

Original discussion in slack: https://aztecprotocol.slack.com/archives/C04DL2L1UP2/p1688130888491039?thread_ts=1688126823.693239&cid=C04DL2L1UP2