common/hex_util: Combine HexVectorToString() and HexArrayToString()

These can be generified together by using a concept type to designate
them. This also has the benefit of not making copies of potentially very
large arrays.

src/core/file_sys/ips_layer.cpp

@@ -295,7 +295,7 @@ void IPSwitchCompiler::Parse() {
                     LOG_INFO(Loader,
                              "[IPSwitchCompiler ('{}')]     - Patching value at offset 0x{:08X} "
                              "with byte string '{}'",
-                             patch_text->GetName(), offset, Common::HexVectorToString(replace));
+                             patch_text->GetName(), offset, Common::HexToString(replace));
                 }
 
                 patch.records.insert_or_assign(offset, std::move(replace));