[dvc][fc][tc] Lazily register client-side metrics

[kvargha]

Summary

Unused metrics result in excessive WARN log messages. By registering metrics only when they are recorded, this issue is avoided.

How was this PR tested?

CI

Does this PR introduce any user-facing changes?

• [X] No. You can skip the rest of this section.
• [ ] Yes. Make sure to explain your proposed changes and call out the behavior change.

[ZacAttack]

Is there a rhyme or reason to which metrics we did this fix for? I think it's non exhaustive?

[kvargha]

Closing due to OTEL migration