Removed the legacy JIT32 assert regarding 4-byte alignment inArenaAllocator::allocate...

Removed the legacy JIT32 assert regarding 4-byte alignment inArenaAllocator::allocateMemory
Immediately after this assert we roundUp to an pointer size allocation amount.

Stopped using two implementation of ArenaAllocator::allocateMemory
Instead we add ifdef DEBUG parts to the common version
Move the implementation of ArenaAllocator::allocateMemory to the header file

Fixed a couple of allocations in assertionprop to use CMF_AssertionProp so that we correctly
attribute which phase uses the memory being allocated.
Added range check for the array writes in Compiler::optMapComplementary

Removed the AlignUp to 4-byte in operator new and new[] in compiler.hpp