Add NFS rewinds data

[shawnahall71]

Is your feature request related to a problem? Please describe.
We're experiencing a performance issue with our NetApp system, and support has determined that it is related to a high number of NFS rewinds as mentioned in this support article.

Describe the solution you'd like
It would be helpful if Harvest collected these NFS rewind statistics so we can view them historically.

Describe alternatives you've considered
Currently we can only run CLI statistics commands to see the NFS rewinds data and average over a period of time. NetApp support has the ability to pull this information from performance snapshots, but I don't have a good way to graph these metrics myself short of extending what Harvest is doing.

Additional context
After opening various NetApp support cases, it's clear that NetApp performance engineers have access to a richer set of statistics than customers do, although the data Harvest collects is quite good. It would be nice for NetApp power users to have access to deeper insights like support does.

[Hardikl]

@shawnahall71

We've added the rw_ctx ZapiPerf object template via PR #2494 which has NFS rewinds data.
Fix would be available via nightly build.

Added Rewind View Row in Node Dashboard with 6 new panels.

[rahulguptajss]

verified in main