Add Dell M1000e and HP Superdome targeted SNMP discovery templates

[lucthienphong1120]

Description

This PR introduces two new robust SNMP templates designed specifically to monitor massive enterprise Blade Enclosures:

1. Dell M1000e CMC Enclosure by SNMP
2. HP BladeSystem Superdome Enclosure by SNMP

Motivation and Details

Monitoring massive enclosures (like the M1000e or Superdome) natively often fails because walking the entire Asset or Sensor tables (e.g., cpqRackCommonEnclosureAssetTable) causes severe SNMP timeouts on slow Management Module interfaces, especially when "Use bulk requests" is enabled.

These templates solve this issue by implementing highly targeted Low-Level Discovery (LLD) rules. Instead of requesting the generic large tables, the templates perform granular SNMP walks directed exclusively at the specific operational tables:

• Power Supplies (Status, Max Watts)
• Chassis Fans (Condition/Status)
• Temperature Sensors (Current value, Condition)
• Blade Servers (Status, Model, Serial)

Key Features

• Custom value mappings mapped to vendor-specific MIBs (HP-MIB::PSUStatusEnum, HP-MIB::StatusEnum, etc.)
• Unique naming logic for sub-items that share the same location strings (dynamically appending {#SNMPINDEX} to avoid naming collisions in Zabbix).
• Included full Trigger Prototypes handling hardware error states (Failed, Degraded, bistFailure, etc.)
• Built with native Zabbix 7.0 YAML structure (trigger_prototypes properly placed outside item_prototypes).

Tested thoroughly and verified working on production environments.