Implement automated binary re-relativization for AArch32 and AArch64

Xref related issues: #731 (closed), #3271 (closed), #3339 This issue covers implementing automated binary re-relativization of AArch32 and AArch64 instructions. We will need a different strategy than the x86 approach of storing the location of a 32-bit immediate, due to the varying immediate encodings. For now, decode_from_copy() invalidates the raw bits to force a re-encoding as a workaround for not having this feature.