Fix: Remove `gasleft` in `setupModules`, add erc4337 compatibility test

[mmv08]

This PR:

• Fixes #568 by replacing the gasleft with type(uint256).max
• Adds a test for ERC4337 compatibility that uses a live production network with a production bundler. The test estimates gas for a user operation that deploys a Safe + executes a transaction. It uses a dummy ERC4337 module that doesn't have any security measures. The test is run optionally if the environment variables required for the test are set. The requirements are added in the README.md

[github-actions[bot]]

Pull Request Test Coverage Report for Build 5078570173

• 1 of 15 (6.67%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-4.3%) to 92.8%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
contracts/test/4337/Test4337ModuleAndHandler.sol	0	14	0.0%
<!--	Total:	1	15	6.67%	-->

Totals
Change from base Build 4991446336:	-4.3%
Covered Lines:	308
Relevant Lines:	330

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💛 - Coveralls