feat: otel metrics

[fenos]

What kind of change does this PR introduce?

Feature

What is the current behavior?

Currently metrics are gathered using the prom-client and exposed to a metric endpoint

What is the new behavior?

• All metrics are now otel metrics and can be pushed to a 3rd party otel backend
• We still can optionally expose prometheus metrics in the /metrics endpoint using the otel prom exporter (ENABLE_PROMETHEUS_METRICS)
• All children spans will now include the tenant.ref attribute from a top level span
• Revamped grafana dashboard using otel metrics

[coveralls]

Pull Request Test Coverage Report for Build 20617070357

Details

• 428 of 943 (45.39%) changed or added relevant lines in 23 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.4%) to 75.637%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/admin-app.ts	5	6	83.33%
src/internal/database/pool.ts	1	2	50.0%
src/internal/queue/event.ts	1	7	14.29%
src/internal/queue/queue.ts	3	9	33.33%
src/internal/monitoring/system/base-collector.ts	33	45	73.33%
src/internal/monitoring/system/process-start-collector.ts	12	26	46.15%
src/http/plugins/metrics.ts	105	124	84.68%
src/internal/monitoring/system/handles-collector.ts	10	36	27.78%
src/internal/monitoring/system/instrumentation.ts	41	82	50.0%
src/internal/monitoring/system/cpu-collector.ts	3	49	6.12%

Files with Coverage Reduction	New Missed Lines	%
src/admin-app.ts	1	89.19%

Totals
Change from base Build 20603297633:	-0.4%
Covered Lines:	25678
Relevant Lines:	33679

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💛 - Coveralls