Adds route and controller for multiple user role updates

[Ajeyakrishna-k]

Date: 8th December 2023 Developer Name: @Ajeyakrishna-k

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Issue Ticket Number

• 168

Description

Adds a route and controller function to bulk add user role to given discord user id. The discord user id and role to be added will be received via request body. The route can add maximum of 25 roles per request.

Documentation Updated?

• [ ] Yes
• [x] No

Breaking Changes

• [ ] Yes
• [x] No

Development Tested?

• [x] Yes
• [ ] No

Tested in Staging?

• [x] Yes
• [ ] No

Under Feature Flag

• [x] Yes
• [ ] No

Database Changes

• [ ] Yes
• [x] No

Test Coverage