**What type of PR is this?**
Optimisation
**What does this PR do? Why is it needed?**
Use `InitializeFromProtoUnsafeXXX` instead of `InitializeFromProtoXXX`
when possible. (@nisdas' change)
This change avoids useless copies.
The difference between these two methods is the latest copies the input
state. However, if the input state is guaranteed not to be modified
after the use of this function (and, in particular, if the input state
is not used at all after the use of this function), then copying it is
unnecessarry. ==> Using the "unsafe" method is fine in this case.
**Other notes for review**
As a reviewer, you should ensure that when the unsafe method is used,
then the input state is never modified after the use of the function.
This PR is much easier to review directly in VSCode, because it displays
more context by default.
**Acknowledgements**
- [x] I have read
[CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md).
- [x] I have included a uniquely named [changelog fragment
file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd).
- [x] I have added a description with sufficient context for reviewers
to understand this PR.
- [x] I have tested that my changes work as expected and I added a
testing plan to the PR description (if applicable).
* Add the new Fulu state with the new field
* fix the hasher for the fulu state
* Fix ToProto() and ToProtoUnsafe()
* Add the fields as shared
* Add epoch transition code
* short circuit the proposer cache to use the state
* Marshal the state JSON
* update spectests to 1.6.0-alpha.1
* Remove deneb and electra entries from blob schedule
This was cherry picked from PR #15364
and edited to remove the minimal cases
* Fix minimal tests
* Increase deadling for processing blocks in spectests
* Preston's review
* review
---------
Co-authored-by: terence tsao <terence@prysmaticlabs.com>
