fix :removed import { tmpName } from 'tmp-promise'

[muditgaur-1009]

#4553

Summary

Fixes #<replace_with_issue_number>

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[tinfoil-knight]

Hey @muditgaur-1009

• Can you go through the PR template properly & tick off applicable items?
• Also, please place the issue number beside the "Fixes" text so that the attached issue will get automatically closed when this PR is merged.

The tmpName function has been used in multiple places across the repository. Please find all instances & replace them.