fix: pass default_member_permissions in SlashCommand.group()

[artem30801]

Pull Request Type

• Feature addition
• Bugfix
• Documentation update
• Code refactor
• Tests improvement
• CI/CD pipeline enhancement
• Other: [Replace with a description]

Description

SlashCommand.group() now pases parent default_member_permissions (like .subcommand() does) to prevent conflicts and errors during synchonisation (couldn't use SlashCommand.group() when the parent command had default_member_permissions because of that).

Test Scenarios

test_cmd = interactions.SlashCommand(
    name="test",
    description="test",
    default_member_permissions=interactions.Permissions.ADMINISTRATOR,
)

test_grp = test_cmd.group("group", "test group")

Python Compatibility

• I've ensured my code works on Python 3.10.x
• I've ensured my code works on Python 3.11.x

Checklist

• I've run the pre-commit code linter over all edited files
• I've tested my changes on supported Python versions
• I've added tests for my code, if applicable
• I've updated / added documentation, where applicable