Removed StateProofIntervalLastRound and usages

[almog-t]

Summary

Test Plan

[codecov]

Codecov Report

Merging #4337 (d4cfbc6) into feature/stateproofs (b995c5d) will increase coverage by 0.02%.
The diff coverage is 53.12%.

@@                   Coverage Diff                   @@
##           feature/stateproofs    #4337      +/-   ##
=======================================================
+ Coverage                55.57%   55.59%   +0.02%     
=======================================================
  Files                      401      401              
  Lines                    50690    50687       -3     
=======================================================
+ Hits                     28172    28181       +9     
+ Misses                   20132    20121      -11     
+ Partials                  2386     2385       -1     

Impacted Files	Coverage Δ
crypto/merklesignature/merkleSignatureScheme.go	66.97% <0.00%> (ø)
daemon/algod/api/server/v1/handlers/handlers.go	0.63% <0.00%> (+<0.01%)	⬆️
data/basics/stateProofParticipant.go	0.00% <0.00%> (ø)
ledger/apply/stateproof.go	0.00% <0.00%> (ø)
stateproof/builder.go	76.99% <ø> (-0.11%)	⬇️
crypto/merklesignature/committablePublicKeys.go	88.23% <100.00%> (ø)
crypto/stateproof/coinGenerator.go	100.00% <100.00%> (ø)
crypto/stateproof/committableSignatureSlot.go	65.21% <100.00%> (ø)
data/pools/transactionPool.go	52.81% <100.00%> (ø)
data/transactions/stateproof.go	100.00% <100.00%> (ø)
... and 6 more

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[id-ms]

looks good!