Change "IP Block" to "Hardware Block" in help menu

[coleramos425]

Is your feature request related to a problem? Please describe.
Per the Omniperf documentation overhaul, we've agreed to change references to the term "IP Block" to "Hardware Block" for clarity.

Describe the solution you'd like
Change instances of "IP Block" to "Hardware Block", i.e.,
https://github.com/AMDResearch/omniperf/blob/b9e474ec5ff6afcb3ebafc653dcb475acd7096d0/src/parser.py#L164-L174

https://github.com/AMDResearch/omniperf/blob/b9e474ec5ff6afcb3ebafc653dcb475acd7096d0/src/parser.py#L413-L420

CC: @gsitaram

[gsitaram]

@coleramos425 , thanks for copying me. I'll modify the documentation accordingly.

[coleramos425]

Complete and targeted for v2.0.0