Update Instance Configuration to include newly added rate limits

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Problem to solve

Help > Instance Configuration lists limits that are configured for the current GitLab instance. It's missing quite a few limits that have been introduced recently, see Implementation Status.

All limits can be found in Rate Limits.

Proposal

Add the missing limits to the Instance configuration to make sure they are visible by users.

Implementation Status

Limit MR Setting
Rate limits on pipeline creation !209894 (merged) https://docs.gitlab.com/administration/settings/rate_limit_on_pipelines_creation/
Users API rate limits !210680 (merged) https://docs.gitlab.com/administration/settings/rate_limit_on_users_api/
Group API rate limits !215495 https://docs.gitlab.com/administration/settings/rate_limit_on_groups_api/
Project API rate limits !215495 https://docs.gitlab.com/administration/settings/rate_limit_on_projects_api/
Files API rate limits https://docs.gitlab.com/administration/settings/files_api_rate_limits/
Git SSH operations https://docs.gitlab.com/administration/settings/rate_limits_on_git_ssh_operations/
GitLab Pages https://docs.gitlab.com/administration/pages/#rate-limits
Incident Rate Limit https://docs.gitlab.com/administration/settings/incident_management_rate_limits/
Organizations API rate limits https://docs.gitlab.com/administration/settings/rate_limit_on_organizations_api/

Intended users

Edited by Nicholas Wittstruck