chore(metrics): Abstract away metrics-ingestion utils into a reusable package
Related https://gitlab.com/gitlab-org/opstrace/opstrace/-/issues/2421
Initially needed and developed as a part of !2452 (merged), this commit refactors metrics ingestion test-utilities into a (more) reusable package. This allows any tests to be able to generate test metrics-telemetry as the needs might be.
Edited by Ankit Bhatnagar