Remove sign-in service metrics from initializer

[rileyanderson]

Summary

Metrics initialized to 0 are causing issues with the new EKS implementation. The default type for metrics in datadog is rate (which EKS sends) but BRD sets type to count. Metrics are still being initialized in BRD which is clashing with metrics being created in EKS causing frequent flipping between count and rate. Remove sign-in service metrics from the initializer as a test and then remove the initializer if it's not necessary anymore.

Related issue(s)

• Remove Sign-in service metrics from initializer va.gov-team#56949

Testing done

• Tested metrics locally and they get incremented

What areas of the site does it impact?

Sign-in Service metrics

Acceptance criteria

• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected

[LindseySaari]

Let's give it a shot!