[exporter/elasticsearch] Update benchmarks to include OTel mapping mode and metrics

[carsonip]

Component(s)

exporter/elasticsearch

Is your feature request related to a problem? Please describe.

Benchmarks are currently not covering OTel mapping mode and metrics

Describe the solution you'd like

Add benchmarks for OTel mapping mode and metrics

Describe alternatives you've considered

No response

Additional context

No response

[carsonip]

/label -needs-triage

[github-actions]

Pinging code owners:

• exporter/elasticsearch: @JaredTan95 @carsonip @lahsivjar

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