Remove GraphQL name field in CiMinutesProjectMonthlyUsage

What does this MR do and why?

Remove GraphQL name field in CiMinutesProjectMonthlyUsage

The name field is redundant, please use project.name

Changelog: removed

References

• Deprecation issue (where we have all necessary information about this removal): #381894 (closed)
• Deprecation MR: !172880 (merged)
• MR that added the deprecation note on GraphQL field: !95259 (merged)

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