Add bulk remove all firewall rules script for VMs

[coelacant1]

Description

There is no script to bulk remove all firewall rules from VMs/LXCs. While Firewall/BulkAddFirewallLXCVM.sh can add security groups, there is no corresponding removal script. Operators need to clear firewall rules when decommissioning security groups or resetting firewall configurations.

A new script should be added under Firewall/.

Acceptance Criteria

• New script Firewall/BulkRemoveFirewallRules.sh created
• Removes all firewall rules from VMs/LXCs in a specified ID range
• Supports optionally removing only rules matching a specific security group
• Uses ArgumentParser.sh for argument handling