Single-pass epoch processing and optimised block processing (#5279)

* Single-pass epoch processing (#4483, #4573)

Co-authored-by: Michael Sproul <michael@sigmaprime.io>

* Delete unused epoch processing code (#5170)

* Delete unused epoch processing code

* Compare total deltas

* Remove unnecessary apply_pending

* cargo fmt

* Remove newline

* Use epoch cache in block packing (#5223)

* Remove progressive balances mode (#5224)

* inline inactivity_penalty_quotient_for_state

* drop previous_epoch_total_active_balance

* fc lint

* spec compliant process_sync_aggregate (#15)

* spec compliant process_sync_aggregate

* Update consensus/state_processing/src/per_block_processing/altair/sync_committee.rs

Co-authored-by: Michael Sproul <micsproul@gmail.com>

---------

Co-authored-by: Michael Sproul <micsproul@gmail.com>

* Delete the participation cache (#16)

* update help

* Fix op_pool tests

* Fix fork choice tests

* Merge remote-tracking branch 'sigp/unstable' into epoch-single-pass

* Simplify exit cache (#5280)

* Fix clippy on exit cache

* Clean up single-pass a bit (#5282)

* Address Mark's review of single-pass (#5386)

* Merge remote-tracking branch 'origin/unstable' into epoch-single-pass

* Address Sean's review comments (#5414)

* Address most of Sean's review comments

* Simplify total balance cache building

* Clean up unused junk

* Merge remote-tracking branch 'origin/unstable' into epoch-single-pass

* More self-review

* Merge remote-tracking branch 'origin/unstable' into epoch-single-pass

* Merge branch 'unstable' into epoch-single-pass

* Fix imports for beta compiler

* Fix tests, probably

book/src/help_bn.md

@@ -369,10 +369,8 @@ OPTIONS:
             useful for execution nodes which don't improve their payload after the first call, and high values are
             useful for ensuring the EL is given ample notice. Default: 1/3 of a slot.
         --progressive-balances <MODE>
-            Control the progressive balances cache mode. The default `fast` mode uses the cache to speed up fork choice.
-            A more conservative `checked` mode compares the cache's results against results without the cache. If there
-            is a mismatch, it falls back to the cache-free result. Using the default `fast` mode is recommended unless
-            advised otherwise by the Lighthouse team. [possible values: disabled, checked, strict, fast]
+            Deprecated. This optimisation is now the default and cannot be disabled. [possible values: fast, disabled,
+            checked, strict]
         --proposer-reorg-cutoff <MILLISECONDS>
             Maximum delay after the start of the slot at which to propose a reorging block. Lower values can prevent
             failed reorgs by ensuring the block has ample time to propagate and be processed by the network. The default

book/src/validator-inclusion.md

@@ -56,7 +56,6 @@ The following fields are returned:
 	able to vote) during the current epoch.
 - `current_epoch_target_attesting_gwei`: the total staked gwei that attested to
 	the majority-elected Casper FFG target epoch during the current epoch.
-- `previous_epoch_active_gwei`: as per `current_epoch_active_gwei`, but during the previous epoch.
 - `previous_epoch_target_attesting_gwei`: see `current_epoch_target_attesting_gwei`.
 - `previous_epoch_head_attesting_gwei`: the total staked gwei that attested to a
 	head beacon block that is in the canonical chain.
@@ -65,7 +64,7 @@ From this data you can calculate:
 
 #### Justification/Finalization Rate
 
-`previous_epoch_target_attesting_gwei / previous_epoch_active_gwei`
+`previous_epoch_target_attesting_gwei / current_epoch_active_gwei`
 
 When this value is greater than or equal to `2/3` it is possible that the
 beacon chain may justify and/or finalize the epoch.
@@ -80,7 +79,6 @@ curl -X GET "http://localhost:5052/lighthouse/validator_inclusion/0/global" -H
 {
   "data": {
     "current_epoch_active_gwei": 642688000000000,
-    "previous_epoch_active_gwei": 642688000000000,
     "current_epoch_target_attesting_gwei": 366208000000000,
     "previous_epoch_target_attesting_gwei": 1000000000,
     "previous_epoch_head_attesting_gwei": 1000000000