## Why this should be merged
`memsize` blocks usage of Go 1.23. We'll be building with 1.23 via
`avalanchego` anyway (which doesn't transitively import `memsize`) so we
want to run tests with the correct version. It will also unblock #154.
## How this works
✂️
We already cherry-pick the upstream commit
(e4675771ed) that removes `memsize` when
on release branches so we instead do it ourselves and no longer
cherry-pick. To avoid conflicts at the next `geth` sync, this PR should
be reverted before performing the merge. See #128.
## How this was tested
Existing tests.
## Why this should be merged
A separately cherry-picked commit, the fix for `StateDB.Copy()`,
requires Go 1.23 for use of the `maps` package. This, however, breaks
`memsize`, which was later removed later from `geth` for the same
reason.
## How this works
All release branches will now cherry-pick ethereum/go-ethereum#30253.
## How this was tested
Updated list of cherry-picks applied to #142, which [passed
tests](https://github.com/ava-labs/libevm/actions/runs/13371460014/job/37340683594).
