feat(state/core_accessor): add fee estimator

[vgonkivs]

This PR enables third-party estimation for the submit transactions in the node(besides PFB). By default, fee estimation relies on the consensus node to which the node is connected. But the user can now provide a non-default endpoint, so the node will query gas price and gas from it. It can be provided via cli(using "core.estimator.address"). The address will be added to the node's config as FeeEstimatorAddress.
Additionally, the user can now provide a maxGasPrice for every submit tx(via max.gas.price flag)- the max price that the user is willing to pay for the transaction. The transaction will not be submitted in case when estimated gas price exceeds the maxGasPrice(default: minGasPrice*100)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.89189% with 49 lines in your changes missing coverage. Please review.

Project coverage is 45.14%. Comparing base (2469e7a) to head (6fc589d).
Report is 443 commits behind head on main.

Files with missing lines	Patch %	Lines
state/estimator.go	54.16%	17 Missing and 5 partials ⚠️
state/tx_config.go	51.61%	15 Missing ⚠️
state/core_access.go	76.00%	4 Missing and 2 partials ⚠️
nodebuilder/core/flags.go	66.66%	3 Missing and 1 partial ⚠️
nodebuilder/state/cmd/state.go	90.47%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4087      +/-   ##
==========================================
+ Coverage   44.83%   45.14%   +0.30%     
==========================================
  Files         265      309      +44     
  Lines       14620    22660    +8040     
==========================================
+ Hits         6555    10229    +3674     
- Misses       7313    11337    +4024     
- Partials      752     1094     +342     

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