refactor(l2): improve L2 deployer

[ManuelBilbao]

Motivation

Current deployer is meant to be used in development only and is hard to use for people without much context.

Description

The main idea of this PR is to be able to use the deployer from the binary without the need of the repo source code.
Simplify deployer CLI and review defaults. Refactor code to remove unused and unneeded code.

TDX deployment is still pending to refactor, will be addressed in another PR

[github-actions]

Lines of code report

Total lines added: 1
Total lines removed: 94
Total lines changed: 95

Detailed view

+----------------------------------+-------+------+
| File                             | Lines | Diff |
+----------------------------------+-------+------+
| ethrex/cmd/ethrex/l2/deployer.rs | 905   | -87  |
+----------------------------------+-------+------+
| ethrex/cmd/ethrex/l2/options.rs  | 832   | +1   |
+----------------------------------+-------+------+
| ethrex/crates/l2/sdk/src/sdk.rs  | 882   | -6   |
+----------------------------------+-------+------+
| ethrex/crates/l2/utils/mod.rs    | 2     | -1   |
+----------------------------------+-------+------+

[Copilot]

Pull Request Overview

This PR refactors the L2 deployer to simplify its CLI interface and improve usability. The changes restructure the deployer command-line arguments, remove unused code, and standardize environment variable naming patterns.

• Restructures deployer CLI arguments for better organization and usability
• Removes unused test data I/O utilities and refactors code organization
• Updates environment variable naming for consistency across the codebase

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
cmd/ethrex/l2/deployer.rs	Major refactor of deployer CLI interface, argument structure, and contract deployment logic
cmd/ethrex/l2/command.rs	Updates to use new Signer interface for contract calls
cmd/ethrex/l2/options.rs	Adds default RPC URL value to eth options
crates/l2/utils/test_data_io.rs	Completely removes unused test data I/O utilities
crates/l2/utils/mod.rs	Removes reference to deleted test_data_io module
crates/l2/sdk/src/sdk.rs	Updates call_contract function signature and removes unused initialize_contract function
crates/l2/sequencer/utils.rs	Makes DEV_MODE_ADDRESS constant public
Multiple config files	Updates environment variable names and path references for consistency

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[Copilot]

This line can panic if opts.eth_options.rpc_url is empty. The TODO comment acknowledges this issue but it should be addressed. Consider using .get(0) and handling the None case or adding validation earlier in the function.

Suggested change

	.env("RPC_URL", &opts.eth_options.rpc_url[0])
	.env(
	"RPC_URL",
	opts.eth_options.rpc_url.get(0).ok_or_else(|| {
	DeployerError::DeploymentSubtaskFailed(
	"No RPC URL provided in eth_options.rpc_url".to_string(),
	)
	})?,
	)

[LeanSerra]

Looks good, left some comments.

[tomip01]

We can link and close this issue #2787

[fedacking]

Due to shifting priorities, this PR wasn't merged in time and is now really far behind. We close it for now to remake it at a later date.