xrt-smi rearchitecture Patch 4

[aktondak]

Problem solved by the commit

This PR does the following :

1. Replaces embedded json configuration to a generated configuration. This generation code is common to all shims and each shim will derive from it to define whatever custom xrt-smi behavior they want to have.
2. Adds support for allowing multi-configuration Description field for xrt-smi options (through description_array). With this, the test and report list are simple vector stores and formatting is taken care of by XRT correctly.
3. Builds SubCmdJsonObjects only with xbutil and xbmgmt objects only as it should be.
4. Also fixes CR-1226870. This issue was caused due to incorrect configuration in default device cases.

Bug / issue (if any) fixed, which PR introduced the bug, how it was discovered

Problem was discovered when we wanted to scale to multiple different tests separately in each shim.
https://jira.xilinx.com/browse/CR-1226870

How problem was solved, alternative solutions (if any) and why they were rejected

Solved through addition of a new field.

Risks (if any) associated the changes in the commit

xrt-smi should be tested for alveo devices.

What has been tested and how, request additional testing if necessary

Tested with MCDM and XDNA drivers.

Documentation impact (if any)

None

[gbuildx]

Can one of the admins verify this patch?

[stsoe]

Some style change requests, else looks good.

[stsoe]

Looks good. Thanks for making the changes.