feat(l2): add optional --abi flag for contracts compilation

[ilitteri]

Motivation

We want to optionally generate the ABI in JSON format when compiling Solidity code.

[Copilot]

Pull Request Overview

This PR adds an abi_json boolean parameter to the compile_contract function that enables optional ABI JSON generation during Solidity compilation by passing the --abi flag to the solc compiler.

• Added abi_json parameter to compile_contract function
• Updated all call sites to pass false for backward compatibility
• The flag conditionally adds --abi to the solc command when enabled

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
crates/l2/sdk/contract_utils/src/compile.rs	Added abi_json parameter to compile_contract function and conditional --abi flag logic
crates/l2/tests/tests.rs	Updated test calls to compile_contract with new abi_json parameter set to false
crates/l2/sdk/build.rs	Updated build script call to compile_contract with new abi_json parameter set to false
cmd/ethrex/build_l2.rs	Updated all compilation calls with new abi_json parameter set to false

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[github-actions]

Lines of code report

Total lines added: 14
Total lines removed: 0
Total lines changed: 14

Detailed view

+----------------------------------------------------+-------+------+
| File                                               | Lines | Diff |
+----------------------------------------------------+-------+------+
| ethrex/cmd/ethrex/build_l2.rs                      | 421   | +9   |
+----------------------------------------------------+-------+------+
| ethrex/crates/l2/sdk/build.rs                      | 48    | +1   |
+----------------------------------------------------+-------+------+
| ethrex/crates/l2/sdk/contract_utils/src/compile.rs | 95    | +4   |
+----------------------------------------------------+-------+------+