chore(payload): dropped optimistic payload building

[abi87]

just checking what the code looks like without it

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 23 lines in your changes missing coverage. Please review.

Project coverage is 32.43%. Comparing base (5e3edfa) to head (2bef2c7).

Files with missing lines	Patch %	Lines
beacon/blockchain/service.go	0.00%	12 Missing ⚠️
beacon/blockchain/process_proposal.go	0.00%	4 Missing ⚠️
payload/builder/payload.go	0.00%	4 Missing ⚠️
beacon/validator/block_builder.go	0.00%	1 Missing ⚠️
beacon/validator/config.go	0.00%	1 Missing ⚠️
testing/e2e/config/defaults.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2520      +/-   ##
==========================================
+ Coverage   32.30%   32.43%   +0.13%     
==========================================
  Files         350      349       -1     
  Lines       15674    15361     -313     
  Branches       20       20              
==========================================
- Hits         5064     4983      -81     
+ Misses      10247    10021     -226     
+ Partials      363      357       -6     

Files with missing lines	Coverage Δ
beacon/blockchain/metrics.go	0.00% <ø> (ø)
beacon/blockchain/payload.go	0.00% <ø> (ø)
beacon/validator/metrics.go	0.00% <ø> (ø)
node-core/components/chain_service.go	0.00% <ø> (ø)
node-core/components/payload_builder.go	0.00% <ø> (ø)
payload/builder/builder.go	0.00% <ø> (-100.00%)	⬇️
testing/e2e/config/config.go	0.00% <ø> (ø)
beacon/validator/block_builder.go	0.00% <0.00%> (ø)
beacon/validator/config.go	0.00% <0.00%> (ø)
testing/e2e/config/defaults.go	0.00% <0.00%> (ø)
... and 3 more