Telemetry metrics for OTel

[Qard]

What does this PR do?

Adds Telemetry Metrics API and uses it to track types of spans created and finished.

Motivation

We want visibility into OTel adoption so we should record which way spans are created.

[github-actions]

Overall package size

Self size: 4.72 MB
Deduped: 61.19 MB
No deduping: 61.23 MB

Dependency sizes

name	version	self size	total size
@datadog/pprof	2.2.3	14.25 MB	15.13 MB
@datadog/native-iast-taint-tracking	1.5.0	14.86 MB	14.86 MB
@datadog/native-appsec	3.2.0	13.38 MB	13.39 MB
protobufjs	7.1.2	2.76 MB	6.55 MB
@datadog/native-iast-rewriter	2.0.1	2.09 MB	2.1 MB
@opentelemetry/core	1.14.0	872.87 kB	1.47 MB
@datadog/native-metrics	2.0.0	898.77 kB	1.3 MB
@opentelemetry/api	1.4.1	780.32 kB	780.32 kB
opentracing	0.14.7	194.81 kB	194.81 kB
semver	7.5.3	93.39 kB	123.79 kB
@datadog/sketches-js	2.1.0	109.9 kB	109.9 kB
lodash.sortby	4.7.0	75.76 kB	75.76 kB
lru-cache	7.14.0	74.95 kB	74.95 kB
ipaddr.js	2.0.1	59.52 kB	59.52 kB
ignore	5.2.0	48.87 kB	48.87 kB
import-in-the-middle	1.3.5	34.34 kB	38.81 kB
istanbul-lib-coverage	3.2.0	29.34 kB	29.34 kB
retry	0.10.1	27.44 kB	27.44 kB
lodash.uniq	4.5.0	25.01 kB	25.01 kB
limiter	1.1.5	23.17 kB	23.17 kB
lodash.kebabcase	4.1.1	17.75 kB	17.75 kB
lodash.pick	4.4.0	16.33 kB	16.33 kB
node-abort-controller	3.0.1	14.33 kB	14.33 kB
crypto-randomuuid	1.0.0	11.18 kB	11.18 kB
diagnostics_channel	1.1.0	7.07 kB	7.07 kB
path-to-regexp	0.1.7	6.78 kB	6.78 kB
koalas	1.0.2	6.47 kB	6.47 kB
methods	1.1.2	5.29 kB	5.29 kB
module-details-from-path	1.0.3	4.47 kB	4.47 kB

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[codecov]

Codecov Report

Merging #3259 (8533e57) into master (f8442ab) will decrease coverage by 0.32%.
The diff coverage is 95.50%.

@@            Coverage Diff             @@
##           master    #3259      +/-   ##
==========================================
- Coverage   86.08%   85.76%   -0.32%     
==========================================
  Files         194      196       +2     
  Lines        7522     7608      +86     
  Branches       33       33              
==========================================
+ Hits         6475     6525      +50     
- Misses       1047     1083      +36     

Impacted Files	Coverage Δ
packages/dd-trace/src/opentelemetry/span.js	92.45% <ø> (ø)
packages/dd-trace/src/opentracing/tracer.js	98.50% <ø> (+0.02%)	⬆️
packages/dd-trace/src/plugins/tracing.js	57.14% <ø> (ø)
packages/dd-trace/src/telemetry/metrics.js	94.59% <94.59%> (ø)
packages/dd-trace/src/opentracing/span.js	79.46% <100.00%> (+2.69%)	⬆️
packages/dd-trace/src/telemetry/index.js	95.31% <100.00%> (+0.15%)	⬆️

... and 14 files with indirect coverage changes

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[pr-commenter]

Benchmarks

Comparing candidate commit 8533e57 in PR branch otel-telemetry-metrics with baseline commit f8442ab in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 464 metrics, 28 unstable metrics.