refactor(katana): decrease default fixed gas prices values

[kariy]

to better reflect the actual gas prices on mainnet. though not 100% accurate but still within the same ballpark figure.

Summary by CodeRabbit

• New Features
  • Updated gas price constants for ETH and STRK, resulting in reduced transaction costs for users.

These changes will enhance the efficiency of transactions, potentially lowering fees for users interacting with the platform.

[coderabbitai]

Walkthrough

Ohayo, sensei! This pull request modifies several constant gas price variables in the constants.rs file within the Katana module. The values for DEFAULT_ETH_L1_GAS_PRICE and DEFAULT_STRK_L1_GAS_PRICE have been reduced from 100 * u128::pow(10, 9) to 20 * u128::pow(10, 9). Additionally, the DEFAULT_STRK_L1_DATA_GAS_PRICE has been updated from u128::pow(10, 9) to u128::pow(10, 6). The DEFAULT_ETH_L1_DATA_GAS_PRICE remains unchanged.

Changes

File Path	Change Summary
crates/katana/core/src/constants.rs	Updated DEFAULT_ETH_L1_GAS_PRICE from 100 * u128::pow(10, 9) to 20 * u128::pow(10, 9)
	Updated DEFAULT_STRK_L1_GAS_PRICE from 100 * u128::pow(10, 9) to 20 * u128::pow(10, 9)
	Updated DEFAULT_STRK_L1_DATA_GAS_PRICE from u128::pow(10, 9) to u128::pow(10, 6)

Possibly related PRs

• fix(katana): estimate message insufficient fee error #2549: This PR modifies the MsgFromL1 struct and introduces a new variable related to fee estimation, which may be indirectly affected by changes in gas price constants, as both involve fee calculations in the Katana module.
• hotfix(katana): include missing udc class if custom genesis is specified #2575: Although this PR focuses on UDC management and does not directly modify gas price constants, it may relate to overall fee structures in the Katana module, which could be influenced by the changes in gas prices.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.85%. Comparing base (3db62fa) to head (1afd2b4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2658   +/-   ##
=======================================
  Coverage   57.85%   57.85%           
=======================================
  Files         399      399           
  Lines       49800    49800           
=======================================
+ Hits        28810    28814    +4     
+ Misses      20990    20986    -4     

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