Removes the JITLinkMemoryManager pointer and getMemMgr() accessor from
ExecutorProcessControl, replacing them with a
createDefaultMemoryManager() virtual factory method. This follows the
same decoupling pattern applied to DylibManager and MemoryAccess in
earlier patches.
JITLinkMemoryManager ownership moves to the client:
- LLJIT gains a MemMgr member and a MemoryManagerCreator builder hook.
- EPCIndirectionUtils takes a JITLinkMemoryManager& parameter.
- LinkGraphLinkingLayer and ObjectLinkingLayer lose their no-arg
constructors (MemMgr is now required).
- SimpleRemoteEPC::Setup is removed; custom memory manager selection now
happens at the client level rather than during EPC setup.
c6a3c375a6