Fio Plugin

[mfleader]

Changes introduced with this PR

I containerized and created a plugin with input and output schema to execute one fio job configuration file.

• [x] 1. add input parameters
• [x] 2. add output parameters
• [x] 3. add function to write input parameters to a temporary fio job configuration file
• [x] 4. add plugin step to execute workload with given input and parse output
• [x] 5. containerize with Dockerfile
• [x] 6. add code to remove temporary files
• [x] 7. document input parameters
• [x] 8. document output parameters
• [x] 9. add unit tests
• [x] 10. add functional tests
• [x] 11. add example execution documentation to readme

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