This is a huge change, which includes some changes to replace code that
originally cloned to reuse allocations instead. The updated
`elastic-array` crate renames its consuming `Vec`-conversion method to
`into_vec`, which means that I can do a simple
`sed -i 's/to_vec/into_vec/'` and then fix the compilation errors.
This commit is probably a minor performance win and definitely a
significant readability win.
* triedb cleanup
* factor out common portion of trie query
* allocate far fewer times in node decoding
* fix bench compilation
* introduce OwnedNode variant to make iter fast again
* generalize recorder trait to Query
* decode trie outputs cost-free in state
* test for passing closure as query
* optionally use no mangling for accountdb
* add the recorder module
* get_recorded for tries, no virtual dispatch on readonly tries
* add recording test
