Move web_hook_event_resend_api_endpoint_rate_limit FF to setting
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### Proposal
This is related to https://gitlab.com/groups/gitlab-org/-/epics/17281. As part of an [Engineering-wide effort](https://gitlab.com/groups/gitlab-org/-/epics/15814) we want to clean up feature flags in areas where possible. Feature flags are not supported on Dedicated and therefore those features cannot be utilized by customers on the Dedicated platform.
Part of this is the `web_hook_event_resend_api_endpoint_rate_limit` flag. Let's move the functionality that is behind this feature flag to a project level settings `Settings > General`
issue