Add commit hash to the getZipUid function for PR Builds

[guptaaryan16]

Description

This PR aims to improve the current behaviour of the CI for both the PR and deployment . As of now, we have a functionality where we try to create uuid for each configuration of the code generator app template and then return this using a getZIPUid function. This created a problem of not able to differentiate between the zip files and notebooks pushed for the PR Builds and the Deployment Builds.

We introduced a new netlify variable PR_BUILD which is false only when it is a production build. When the PR_BUILD=true, we are going to add the commit hash to the commit uuid generated by the getZipUid function.

Additional context

This issue was suggested in #317

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What is the purpose of this pull request?

• [X] Bug fix
• [ ] New feature
• [ ] Other

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