feat: support prometheus-client metrics exporter

[MrCroxx]

What's changed and what's your intention?

Please explain IN DETAIL what the changes are in this PR and why they are needed. :D

As title.

Checklist

• I have written the necessary rustdoc comments
• I have added the necessary unit tests and integration tests
• I have passed make all (or make fast instead if the old tests are not modified) in my local environment.

Related issues or PRs (optional)

close #791

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
foyer-common/src/metrics/model.rs	100.00% <100.00%> (ø)
foyer-common/src/metrics/registry/noop.rs	100.00% <100.00%> (ø)
...-common/src/metrics/registry/opentelemetry_0_26.rs	100.00% <100.00%> (ø)
...-common/src/metrics/registry/opentelemetry_0_27.rs	100.00% <100.00%> (ø)
foyer-common/src/metrics/registry/prometheus.rs	98.29% <100.00%> (ø)
...mon/src/metrics/registry/prometheus_client_0_22.rs	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes