fix(domain): restore error handling for network operations

[SJFCS]

Restore critical error checks for network
These checks are necessary to ensure proper error propagation when network operations fail.

Fixes #1091

Please make sure you read the contributor documentation before opening a Pull Request.

[SJFCS]

1. In version 0.7.1, the domainGetIfacesInfo function has special logic for error handling.
   if an ErrAgentUnresponsive error is encountered when using qemu-agent to obtain an IP address, the code will ignore the error and continue trying, which gives qemu-agent time to start and respond.

switch virErr := err.(type) {
case libvirt.Error:
    // Agent can be unresponsive if being installed/setup
    if addrsrc == uint32(libvirt.DomainInterfaceAddressesSrcLease) && virErr.Code != uint32(libvirt.ErrOperationInvalid) ||
        addrsrc == uint32(libvirt.DomainInterfaceAddressesSrcAgent) && virErr.Code != uint32(libvirt.ErrAgentUnresponsive) {
        return interfaces, fmt.Errorf("Error retrieving interface addresses: %w", err)
    }
}

2. In the latest version（all version after 0.7.1）, error handling becomes simpler.
   any error will be returned directly, including ErrAgentUnresponsive, which causes qemu-agent to fail before it has fully started and responded.

if err != nil {
    return interfaces, fmt.Errorf("error retrieving interface addresses: %w", err)
}

This PR fixes this error handling.

Make the test cases mentioned issues/1091 pass.