Make the i8259 port emulation not involve IPC
Make the interrupt manager interface not involve IPC
Remove most of the level interrupt RPC connectors as they are too inefficient over IPC. Set the PIT to use the PIC directly instead of over IPC
Rename 'rtc' interface to 'system_rtc' so that it will match what the RTCEmulator component uses to make merging components easier
Rename rtc emulator interfaces to be unambiguous and have an 'rtc' prefix, ready for merging into the Init component
Minor fixes that remove the need to perform subtle reasoning for correctness and just make things more obvious