Electra alpha8 spec updates (#6496)

* Fix partial withdrawals count

* Remove get_active_balance

* Remove queue_entire_balance_and_reset_validator

* Switch to compounding when consolidating with source==target

* Queue deposit requests and apply them during epoch processing

* Fix ef tests

* Clear todos

* Fix engine api formatting issues

* Merge branch 'unstable' into electra-alpha7

* Make add_validator_to_registry more in line with the spec

* Address some review comments

* Cleanup

* Update initialize_beacon_state_from_eth1

* Merge branch 'unstable' into electra-alpha7

* Fix rpc decoding for blobs by range/root

* Fix block hash computation

* Fix process_deposits bug

* Merge branch 'unstable' into electra-alpha7

* Fix topup deposit processing bug

* Update builder api for electra

* Refactor mock builder to separate functionality

* Merge branch 'unstable' into electra-alpha7

* Address review comments

* Use copied for reference rather than cloned

* Optimise and simplify PendingDepositsContext::new

* Merge remote-tracking branch 'origin/unstable' into electra-alpha7

* Fix processing of deposits with invalid signatures

* Remove redundant code in genesis init

* Revert "Refactor mock builder to separate functionality"

This reverts commit 6d10456912.

* Revert "Update builder api for electra"

This reverts commit c5c9aca6db.

* Simplify pre-activation sorting

* Fix stale validators used in upgrade_to_electra

* Merge branch 'unstable' into electra-alpha7

testing/ef_tests/Makefile

@@ -1,4 +1,4 @@
-TESTS_TAG := v1.5.0-alpha.6
+TESTS_TAG := v1.5.0-alpha.8
 TESTS = general minimal mainnet
 TARBALLS = $(patsubst %,%-$(TESTS_TAG).tar.gz,$(TESTS))