fix(protocol): fix an occasional error in test:tokenomics

[davidtaikocha]

ref:

• https://github.com/taikoxyz/taiko-mono/actions/runs/3922408385/jobs/6705324633
• https://github.com/taikoxyz/taiko-mono/actions/runs/3922408385/jobs/6705353997

After some debugging, looks like its because hardhat mocha's top level describe runs the children describes in parallel (including their beforeEachs), which sometimes makes the tests running into an unknown state.

[codecov]

Codecov Report

Merging #12950 (6fbf5c9) into main (59276fe) will decrease coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #12950      +/-   ##
==========================================
- Coverage   66.67%   66.47%   -0.20%     
==========================================
  Files         113      113              
  Lines        3034     3034              
  Branches      356      356              
==========================================
- Hits         2023     2017       -6     
- Misses        935      941       +6     
  Partials       76       76              

Flag	Coverage Δ		*Carryforward flag
bridge-ui	95.05% <ø> (ø)		Carriedforward from 59276fe
protocol	59.23% <ø> (-0.38%)	⬇️
relayer	69.10% <ø> (ø)		Carriedforward from 59276fe
ui	100.00% <ø> (ø)		Carriedforward from 59276fe

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

Impacted Files	Coverage Δ
...es/protocol/contracts/thirdparty/LibMerkleTrie.sol	83.13% <0.00%> (-7.23%)	⬇️

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