Fix electra light client types (#6361)

* persist light client updates

* update beacon chain to serve light client updates

* resolve todos

* cache best update

* extend cache parts

* is better light client update

* resolve merge conflict

* initial api changes

* add lc update db column

* fmt

* added tests

* add sim

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into persist-light-client-updates

* fix some weird issues with the simulator

* tests

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into persist-light-client-updates

* test changes

* merge conflict

* testing

* started work on ef tests and some code clean up

* update tests

* linting

* noop pre altair, were still failing on electra though

* allow for zeroed light client header

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into persist-light-client-updates

* merge unstable

* remove unwraps

* remove unwraps

* fetch bootstrap without always querying for state

* storing bootstrap parts in db

* mroe code cleanup

* test

* prune sync committee branches from dropped chains

* Update light_client_update.rs

* merge unstable

* move functionality to helper methods

* refactor is best update fn

* refactor is best update fn

* improve organization of light client server cache logic

* fork diget calc, and only spawn as many blcoks as we need for the lc update test

* resovle merge conflict

* add electra bootstrap logic, add logic to cache current sync committee

* add latest sync committe branch cache

* fetch lc update from the cache if it exists

* fmt

* Fix beacon_chain tests

* Add debug code to update ranking_order ef test

* Fix compare code

* merge conflicts

* merge conflict

* add better error messaging

* resolve merge conflicts

* remove lc update from basicsim

* rename sync comittte variable and fix persist condition

* refactor get_light_client_update logic

* add better comments, return helpful error messages over http and rpc

* pruning canonical non checkpoint slots

* fix test

* rerun test

* update pruning logic, add tests

* fix tests

* fix imports

* fmt

* refactor db code

* Refactor db method

* Refactor db method

* lc electra changes

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into light-client-electra

* add additional comments

* testing lc merkle changes

* lc electra

* update struct defs

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into light-client-electra

* fix merge

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into persist-light-client-bootstrap

* fix merge

* linting

* merge conflict

* prevent overflow

* enable lc server for http api tests

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into light-client-electra

* get tests working:

* remove related TODOs

* fix test lint

* Merge branch 'persist-light-client-bootstrap' of https://github.com/eserilev/lighthouse into light-client-electra

* fix tests

* fix conflicts

* remove prints

* Merge branch 'persist-light-client-bootstrap' of https://github.com/eserilev/lighthouse into light-client-electra

* remove warning

* resolve conflicts

* merge conflicts

* linting

* remove comments

* cleanup

* linting

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into light-client-electra

* pre/post electra light client cached data

* add proof type alias

* move is_empty_branch method out of impl

* add ssz tests for all forks

* refactor beacon state proof codepaths

* rename method

* fmt

* clean up proof logic

* refactor merkle proof api

* fmt

* Merge branch 'unstable' into light-client-electra

* Use superstruct mapping macros

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into light-client-electra

* rename proof to merkleproof

* fmt

* Resolve merge conflicts

* merge conflicts

beacon_node/beacon_chain/tests/store_tests.rs

@@ -206,13 +206,6 @@ async fn light_client_bootstrap_test() {
         .build()
         .expect("should build");
 
-    let current_state = harness.get_current_state();
-
-    if ForkName::Electra == current_state.fork_name_unchecked() {
-        // TODO(electra) fix beacon state `compute_merkle_proof`
-        return;
-    }
-
     let finalized_checkpoint = beacon_chain
         .canonical_head
         .cached_head()
@@ -353,11 +346,6 @@ async fn light_client_updates_test() {
 
     let current_state = harness.get_current_state();
 
-    if ForkName::Electra == current_state.fork_name_unchecked() {
-        // TODO(electra) fix beacon state `compute_merkle_proof`
-        return;
-    }
-
     // calculate the sync period from the previous slot
     let sync_period = (current_state.slot() - Slot::new(1))
         .epoch(E::slots_per_epoch())