[sharktank] Add perplexity CI to sharktank dashboard

[archana-ramalingam]

Add perplexity CI to sharktank dashboard
Rename _vmfb to _iree
Add Perplexity scoreboard & description
Add descriptive errors for better logging

[archana-ramalingam]

@saienduri Would like to add Perplexity CI results to this dashboard too. pytest-html doesn't auto-merge existing html files. Do we need a utility function to do this separately?

[saienduri]

I don't think we need to merge the html files themselves. Each one will live on it's own subsite with an overarching index.html that points to each of them was what I was thinking. I am planning to explore this when I get some time today

[archana-ramalingam]

I don't think we need to merge the html files themselves. Each one will live on it's own subsite with an overarching index.html that points to each of them was what I was thinking. I am planning to explore this when I get some time today

Makes sense. I tried to push the perplexity.html to a new folder perplexity. But it seems to have replaced the existing index.html at root, the last time I ran it.

Each folder in gh-pages branch rep a subsite IIUC. We need IREE perplexity and Torch perplexity as the subsites/folders.