feat(protocol): make TaikoL1/V1TaikoL2.getConstants() returning K_ZKPROOFS_PER_BLOCK

[davidtaikocha]

Client softwares need to know K_ZKPROOFS_PER_BLOCK to assemble the evidences when proving blocks.

[codecov]

Codecov Report

Merging #323 (358fc56) into main (0052673) will increase coverage by 0.24%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #323      +/-   ##
==========================================
+ Coverage   62.91%   63.16%   +0.24%     
==========================================
  Files          82       82              
  Lines        2416     2416              
  Branches      281      281              
==========================================
+ Hits         1520     1526       +6     
+ Misses        828      821       -7     
- Partials       68       69       +1     

Flag	Coverage Δ		*Carryforward flag
protocol	59.00% <ø> (+0.43%)	⬆️
relayer	68.77% <ø> (ø)		Carriedforward from 0052673

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
packages/protocol/contracts/L1/TaikoL1.sol	17.77% <ø> (ø)
packages/protocol/contracts/L2/V1TaikoL2.sol	56.81% <ø> (ø)
...es/protocol/contracts/thirdparty/LibMerkleTrie.sol	90.36% <0.00%> (+7.22%)	⬆️

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