Persist light client updates (#5545)

* 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

* 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

* 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

* fix test

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

* Use blinded blocks for light client proofs

* fix ef test

* merge conflicts

* fix lc update check

* Lint

* resolve merge conflict

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

* revert basic sim

* small fix

* revert sim

* Review PR

* resolve merge conflicts

* Merge branch 'unstable' into persist-light-client-updates

testing/ef_tests/src/cases.rs

@@ -24,6 +24,7 @@ mod kzg_compute_kzg_proof;
 mod kzg_verify_blob_kzg_proof;
 mod kzg_verify_blob_kzg_proof_batch;
 mod kzg_verify_kzg_proof;
+mod light_client_verify_is_better_update;
 mod merkle_proof_validity;
 mod operations;
 mod rewards;
@@ -54,6 +55,7 @@ pub use kzg_compute_kzg_proof::*;
 pub use kzg_verify_blob_kzg_proof::*;
 pub use kzg_verify_blob_kzg_proof_batch::*;
 pub use kzg_verify_kzg_proof::*;
+pub use light_client_verify_is_better_update::*;
 pub use merkle_proof_validity::*;
 pub use operations::*;
 pub use rewards::RewardsTest;