Module Update for Safe 1.5.0

[nlordell]

Context / issue

Safe v1.5.0 has some changes that have an effect on the 4337 module code. Namely:

• contract signature owners follow the ERC-1271 interface instead of a slight variation of it
• Fully memory-safe assembly, enabling the use of viaIR optimization flag to improve gas characteristics of the module (see Enabling yul optimizer and viaIR based compilation #207)

Proposed solution

Implement required changes to the 4337 contracts to ensure compatibility with Safe v1.5.0:

• Ensure contract owner signer compatibility with both 1.4.1 and 1.5.0 Safe versions
• Enable viaIR flag for improved gas characteristics

Alternatives

Don't update the codebase to account for changes in Safe 1.5.0.