Remove generation of graph plots from benchmark runs

[agunapal]

Description

I noticed that we generate plots during benchmark runs and these take a while
These plots are not being used anywhere

• Introduced an optional parameter called generate_graphs with default value False

Fixes #(issue)

I believe this should speed up benchmark runs by at least 10-15%
Will update the exact numbers after a nightly run.

• Reduced GPU benchmark time from 2 hour 27 min to 1 hour 40 min

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Feature/Issue validation/testing

Before

*Generating CSV output...
Saving benchmark results to /tmp
*Preparing graphs...
*Preparing Profile graphs...
Working with sampling rate of 100

Test suite execution complete.

After

*Generating CSV output...
Saving benchmark results to /tmp

Test suite execution complete.

Checklist:

• Did you have fun?
• Have you added tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

[codecov]

Codecov Report

Merging #2228 (67aba69) into master (2aee8fb) will not change coverage.
The diff coverage is n/a.

❗ Current head 67aba69 differs from pull request most recent head da5e0c9. Consider uploading reports for the commit da5e0c9 to get more accurate results

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  Misses        954      954           
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