fix(relayer): estimate gas, now that gas estimation works again

[cyberhorsey]

Gas estimation was having an issue before, we hardcoded gas amount. It now works again, so we can re-enable the gas estimation, as well as the relayer determining if a tx is profitable. This will fix some relayer revert transactions.

[codecov]

Codecov Report

Merging #13176 (47f48c5) into main (4f7ab64) will increase coverage by 0.02%.
The diff coverage is 40.00%.

@@            Coverage Diff             @@
##             main   #13176      +/-   ##
==========================================
+ Coverage   60.95%   60.97%   +0.02%     
==========================================
  Files         115      115              
  Lines        3391     3380      -11     
  Branches      460      447      -13     
==========================================
- Hits         2067     2061       -6     
+ Misses       1241     1234       -7     
- Partials       83       85       +2     

Flag	Coverage Δ		*Carryforward flag
bridge-ui	92.61% <ø> (ø)		Carriedforward from 4f7ab64
protocol	51.93% <ø> (+0.13%)	⬆️	Carriedforward from 4f7ab64
relayer	65.78% <40.00%> (-0.29%)	⬇️
ui	100.00% <ø> (ø)		Carriedforward from 4f7ab64

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

Impacted Files	Coverage Δ
packages/protocol/contracts/L1/ProofVerifier.sol	0.00% <ø> (ø)
packages/protocol/contracts/L1/TaikoL1.sol	32.69% <ø> (ø)
packages/protocol/contracts/L1/TkoToken.sol	84.21% <ø> (ø)
...ckages/protocol/contracts/L1/libs/LibProposing.sol	6.66% <ø> (+0.25%)	⬆️
packages/protocol/contracts/L1/libs/LibProving.sol	0.00% <ø> (ø)
packages/protocol/contracts/L1/libs/LibUtils.sol	32.20% <ø> (ø)
...ckages/protocol/contracts/L1/libs/LibVerifying.sol	11.90% <ø> (ø)
packages/protocol/contracts/L2/TaikoL2.sol	53.84% <ø> (ø)
packages/protocol/contracts/bridge/Bridge.sol	41.17% <ø> (ø)
...ackages/protocol/contracts/bridge/BridgedERC20.sol	95.65% <ø> (ø)
... and 59 more

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