* Revert "Revert "Update fastssz" (#7100)"
This reverts commit b954db9704.
* Preston's patch
* Merge branch 'master' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* Update fssz, add regression test case
* more HTR with fssz
* fix some tests
* only one test left
* Make it so that HTR will work
* gofmt, imports
* gofmt, imports
* fix
* Merge branch 'master' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* fix
* Merge branch 'master' into revert-7100-revert-6760-update-fssz
* Merge refs/heads/master into revert-7100-revert-6760-update-fssz
* gaz
* Merge branch 'revert-7100-revert-6760-update-fssz' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* Merge refs/heads/master into revert-7100-revert-6760-update-fssz
* fix test
* Merge branch 'revert-7100-revert-6760-update-fssz' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* Merge refs/heads/master into revert-7100-revert-6760-update-fssz
* Add database migrations, still need to update the API usage...
* gofmt goimports
* progress
* Merge branch 'master' of github.com:prysmaticlabs/prysm into index-migration
* use slot instead of index
* rename LastArchivedIndex to LastArchivedSlot
* rename LastArchivedIndexRoot to LastArchivedRoot
* remove unused HighestSlotStates method
* deprecate old key, include in migration
* deprecate old key, include in migration
* remove blocks index in migration
* rename bucket variable
* fix code to pass tests
* Merge branch 'master' of github.com:prysmaticlabs/prysm into index-migration
* gofmt, goimports
* fix
* Add state slot index
* progress
* lint
* fix build
* Merge branch 'master' of github.com:prysmaticlabs/prysm into index-migration
* kafka
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* remove SaveArchivedPointRoot, a few other big changes
* Merge branch 'index-migration' of github.com:prysmaticlabs/prysm into index-migration
* fix tests and lint
* lint again
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* block migration, some renaming
* gaz, gofmt
* add tests
* change index to uint bytes
* Merge branch 'index-migration' of github.com:prysmaticlabs/prysm into index-migration
* rm method notes
* stop if the bucket doesn't exist
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* @rauljordan pr feedback
* Simplify
* Merge refs/heads/master into index-migration
* Remove unused method, add roundtrip test
* gofmt
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge refs/heads/master into index-migration
* Merge branch 'master' of github.com:prysmaticlabs/prysm into index-migration
* Sweeping replace of ssz.HashTreeRoot(block) to stateutil.BlockRoot, minor tweaks to critical path of proposeBlock
* imports
* Merge branch 'master' into better-block-htr
* Add --enable-custom-block-htr to e2e flags
* Merge branch 'better-block-htr' of github.com:prysmaticlabs/prysm into better-block-htr
* Better error
* Use copy
* Conflict
* Fixed a bug on using pre state. Added a LRU cache for saving pre state.
* Removed interaction menu. Ran Gazelle
* Fixed delete state to continue than exit
* Gazelle
* Merge branch 'master' of github.com:prysmaticlabs/prysm into regen-default
* Merge refs/heads/master into regen-default
* Added a warning message
* Merge branch 'regen-default' of github.com:prysmaticlabs/prysm into regen-default
* Merge refs/heads/master into regen-default
* Enforce error handling and checking type assertions
* Reference issue #5404 in the TODO message
* doc description
* Merge branch 'master' into errcheck
* fix tests and address @nisdas feedbacK
* gaz
* fix docker image
