fix(cmm): BSV2 update metrics to more permissive type (#2805)

* update metrics to more permissive type

* changeset
Co-authored-by: Will Cory <willcory@Wills-MacBook-Pro.local>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.changeset/clever-bees-visit.md

+---
+'@eth-optimism/common-ts': minor
+---
+
+Make typescript type more permissive for MetricsV2

packages/common-ts/src/base-service/base-service-v2.ts

@@ -34,9 +34,7 @@ export type OptionsSpec<TOptions extends Options> = {
   }
 }
 
-export type MetricsV2 = {
-  [key: string]: Metric
-}
+export type MetricsV2 = Record<any, Metric>
 
 export type StandardMetrics = {
   metadata: Gauge