Create bulk mutation queries for User

## Motivation

[Why is this Epic important? Clearly describe the context and reasons for creating this Epic.]

- I’m planning to create an issue for bulk mutations under the corresponding epic issue.

## Objective

[What is the main goal of this Epic? Describe the desired outcome]

- replace mutation queries with bulk mutation.

## Expected Sub Issue

[Please list the subtasks you expect.]

- bulk update mutation for UserNode
- bulk purge mutation for UserNode
- bulk update mutation for ProjectNode

JIRA Issue: BA-3826