add support for opensearch

[rochdev]

What does this PR do?

Add support for OpenSearch.

Motivation

Closes #1966

Plugin Checklist

• [x] Unit tests.
• [x] TypeScript definitions.
• [x] TypeScript tests.
• [x] API documentation.
• [x] CircleCI jobs/workflows.
• [x] Plugin is exported.

[github-actions[bot]]

Overall package size

Self size: 2.74 MB Deduped: 30.38 MB No deduping: 31.03 MB

Dependency sizes

name	version	self size	total size
@datadog/pprof	1.0.2	8.74 MB	14.46 MB
@datadog/native-metrics	1.4.2	6.61 MB	7.04 MB
@datadog/native-appsec	1.2.1	5.1 MB	5.43 MB
cidr-matcher	2.1.1	224.94 kB	451.39 kB
opentracing	0.14.7	194.81 kB	194.81 kB
@datadog/sketches-js	2.1.0	109.9 kB	109.9 kB
lodash.sortby	4.7.0	75.76 kB	75.76 kB
semver	5.7.1	61.58 kB	61.58 kB
ignore	5.2.0	48.87 kB	48.87 kB
import-in-the-middle	1.3.1	30.44 kB	34.91 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
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[bot]]

Codecov Report

Merging #2348 (36f3bf1) into master (a6478f6) will increase coverage by 0.00%. The diff coverage is 89.79%.

@@           Coverage Diff           @@
##           master    #2348   +/-   ##
=======================================
  Coverage   92.67%   92.68%           
=======================================
  Files         276      278    +2     
  Lines        9390     9402   +12     
=======================================
+ Hits         8702     8714   +12     
  Misses        688      688           

Impacted Files	Coverage Δ
...ages/datadog-instrumentations/src/elasticsearch.js	89.13% <86.84%> (+0.49%)	:arrow_up:
...ackages/datadog-instrumentations/src/opensearch.js	100.00% <100.00%> (ø)
packages/datadog-plugin-elasticsearch/src/index.js	100.00% <100.00%> (ø)
packages/datadog-plugin-opensearch/src/index.js	100.00% <100.00%> (ø)
packages/dd-trace/src/plugins/index.js	100.00% <100.00%> (ø)

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