[Apps/Users/Groups] Export metadata to CSV

[sohel-rp]

Summary

Provide functionality to export apps, user permissions & permission groups metadata to CSV.

Motivation

Currently, there's no option to export Apps, User, and Permission Groups metadata to CSV. Enabling this functionality will be helpful to avoid/reduce any manual work involved for the same.

Proposal

Provide an Export CSV button on the App listing, user permissions, and permission groups pages to export apps, user permissions & permission groups metadata to CSV respectively.

- Export button on different pages

- Export in progress/success

[sohel-rp]

Changes have been made under devtron-labs/dashboard#504.