[3/n] chore(types): Introduce DepositData and Deposit types for holding proofs

[calbera]

• Consistent with ETH2 spec
• old Deposit is now DepositData
• Deposit now includes Proof: double check the SSZ impl according to karalabe/ssz
• Flow of writing/reading deposits:
  • First Enqueue the DepositDatas (which comes from the EL events directly)
  • Then get the Deposits (with the proofs attached) from the store

[codecov]

Codecov Report

Attention: Patch coverage is 73.42657% with 38 lines in your changes missing coverage. Please review.

Project coverage is 31.73%. Comparing base (76c153d) to head (566d431).

Files with missing lines	Patch %	Lines
consensus-types/types/deposit_data.go	84.70%	12 Missing and 1 partial ⚠️
cli/commands/genesis/collect.go	0.00%	5 Missing ⚠️
consensus-types/types/body.go	63.63%	3 Missing and 1 partial ⚠️
execution/deposit/contract.go	0.00%	3 Missing ⚠️
state-transition/core/validation_deposits.go	40.00%	1 Missing and 2 partials ⚠️
beacon/blockchain/pruning.go	0.00%	2 Missing ⚠️
consensus-types/types/deposits.go	33.33%	2 Missing ⚠️
consensus/cometbft/service/genesis.go	0.00%	2 Missing ⚠️
beacon/blockchain/deposit.go	0.00%	1 Missing ⚠️
beacon/blockchain/init_chain.go	0.00%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@                 Coverage Diff                 @@
##           4881-spec-tests    #2290      +/-   ##
===================================================
- Coverage            31.83%   31.73%   -0.11%     
===================================================
  Files                  337      338       +1     
  Lines                15772    15709      -63     
  Branches                20       20              
===================================================
- Hits                  5021     4985      -36     
+ Misses               10394    10375      -19     
+ Partials               357      349       -8     

Files with missing lines	Coverage Δ
consensus-types/types/block.go	100.00% <ø> (+5.66%)	⬆️
consensus-types/types/genesis.go	87.50% <100.00%> (ø)
state-transition/core/state_processor_genesis.go	48.36% <ø> (ø)
state-transition/core/state_processor_staking.go	53.93% <100.00%> (ø)
storage/deposit/store.go	65.09% <100.00%> (+6.84%)	⬆️
beacon/blockchain/deposit.go	0.00% <0.00%> (ø)
beacon/blockchain/init_chain.go	0.00% <0.00%> (ø)
cli/commands/genesis/deposit.go	0.00% <0.00%> (ø)
consensus-types/types/deposit.go	43.75% <83.33%> (-40.96%)	⬇️
beacon/blockchain/pruning.go	0.00% <0.00%> (ø)
... and 7 more