Move away from using const references of std::vector<unsigned char> for target memory buffers. Replaced with std::span<const unsigned char> (via TargetMemoryBufferSpan alias)

src/Targets/RiscV/RiscV.cpp

@@ -235,7 +235,7 @@ namespace Targets::RiscV
         const TargetAddressSpaceDescriptor& addressSpaceDescriptor,
         const TargetMemorySegmentDescriptor& memorySegmentDescriptor,
         TargetMemoryAddress startAddress,
-        const TargetMemoryBuffer& buffer
+        TargetMemoryBufferSpan buffer
     ) {
         assert(!buffer.empty());