refactor(validator): Forkchoice update logic should be more consolidated

[itsdevbear]

We need to manage FCU's and the EL in a more sophisticated fashion, moving all FCU calls into a single place is a good place to start

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 263 lines in your changes missing coverage. Please review.

Project coverage is 21.75%. Comparing base (6be1464) to head (7340c79).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1373   +/-   ##
=======================================
  Coverage   21.75%   21.75%           
=======================================
  Files         231      232    +1     
  Lines       11157    11154    -3     
  Branches       18       18           
=======================================
  Hits         2427     2427           
+ Misses       8568     8565    -3     
  Partials      162      162           

Files	Coverage Δ
mod/beacon/validator/metrics.go	0.00% <ø> (ø)
mod/beacon/validator/service.go	0.00% <ø> (ø)
mod/beacon/validator/state.go	0.00% <ø> (ø)
mod/execution/pkg/client/client.go	0.00% <0.00%> (ø)
mod/runtime/pkg/runtime/runtime.go	0.00% <0.00%> (ø)
mod/beacon/blockchain/process.go	0.00% <0.00%> (ø)
mod/runtime/pkg/runtime/middleware/validator.go	0.00% <0.00%> (ø)
testing/e2e/suite/setup.go	0.00% <0.00%> (ø)
mod/node-core/pkg/config/spec/devnet.go	0.00% <0.00%> (ø)
beacond/cmd/main.go	0.00% <0.00%> (ø)
... and 8 more