Fix SFP Support and add Platform as PE feature

[jahofmann]

This pull request adds the following new platform:

• AU50: HBM attached in global address mode.

This pull request fixes/adds SFP+ for the following platforms:

• VCU118
• NetFPGA SUME: New tool to program the clock generator via I2C included.
• AU50

These changes rely on a fix for #278 which is not included.

Finally, the rust runtime now supports treating platform components as PEs (Commit 03d717e). This way it is easy to add e.g. clock programmers to platforms and control them with the convenient PE interface. Furthermore, there is an unsafe function to provide direct access to the platform component memory which can be used for tools like tapasco-debug.