sysutils/storcli2: New port: SAS4 MegaRAID FreeBSD StorCLI2

Command Line Interface for the MegaRAID SAS4 family of RAID controllers,
used to configure and manage connected storage devices.

The StorCLI2 tool supports the following controllers:

• MegaRAID 9600 Family eHBA Adapters
• MegaRAID 9620 Family eHBA Adapters
• MegaRAID 9660 Family RAID Adapters
• MegaRAID 9670 Family RAID Adapters

https://techdocs.broadcom.com/us/en/storage-and-ethernet-connectivity/enterprise-storage-solutions/megaraid8-tri-mode-software/1-0/StorCLI_MR8_Intro.html

PR: 293540
Sponsored by: UNIS Labs
Co-authored-by: Vladimir Druzenko <vvd@FreeBSD.org>