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

---

What is the purpose of this pull request?

• Bug fix
• New feature
• Other

[netlify]

✅ Deploy Preview for code-generator ready!

Name	Link
🔨 Latest commit	3694b26
🔍 Latest deploy log	https://app.netlify.com/sites/code-generator/deploys/6509574af953df0008a05da9
😎 Deploy Preview	https://deploy-preview-319--code-generator.netlify.app/
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[vfdev-5]

LGTM, thanks @guptaaryan16 !