Migrate expiration policy metrics

What does this MR do and why?

This MR migrate counts.projects_with_expiration_policy_enabled(_with_cadence*) metrics family to instrumentation class.

It resolves part of the metrics included in #339315 (closed)

Screenshots or screen recordings

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How to set up and validate locally

Setup (optional)

::ContainerExpirationPolicy.limit(30).update_all(enabled: true)
::ContainerExpirationPolicy.cadence_options.keys.each_with_index do |value, idx|
  ::ContainerExpirationPolicy.active.offset(idx * 5).limit(5).update_all(cadence: value)
end

Verfication

payload = ServicePing::BuildPayload.new.execute
puts "enabled: #{payload["counts"]["projects_with_expiration_policy_enabled"]}"
puts "enabled with cadence_set_to_3month: #{payload["counts"]["projects_with_expiration_policy_enabled_with_cadence_set_to_3month"]}"
puts "enabled with cadence_set_to_1month: #{payload["counts"]["projects_with_expiration_policy_enabled_with_cadence_set_to_1month"]}"
puts "enabled with cadence_set_to_1d: #{payload["counts"]["projects_with_expiration_policy_enabled_with_cadence_set_to_1d"]}"
puts "enabled with cadence_set_to_7d: #{payload["counts"]["projects_with_expiration_policy_enabled_with_cadence_set_to_7d"]}"
puts "enabled with cadence_set_to_14d: #{payload["counts"]["projects_with_expiration_policy_enabled_with_cadence_set_to_14d"]}"

MR acceptance checklist

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