[receiver/elasticsearch]: add scraping metrics on cluster level

[aboguszewski-sumo]

Description:
The receiver now scrapes cluster-level metrics from /_cluster/stats endpoint.
There were already some metrics sent with elasticsearch.cluster.name resource attribute, but they used different endpoint (/_cluster/health). I added the newly emitted metrics to the same resource.

Link to tracking Issue: #14635

Testing:
unit, integration

Documentation:
mdatagen

[aboguszewski-sumo]

@djaglowski could this get reviewed soon?

[runforesight]

Foresight Summary

    
Major Impacts

build-and-test-windows duration(4 seconds) has decreased 32 minutes 28 seconds compared to main branch avg(32 minutes 32 seconds).

View More Details

✅  build-and-test workflow has finished in 1 hour 1 minute 44 seconds (⚠️ 6 minutes 54 seconds more than main branch avg.) and finished at 1st Dec, 2022.

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Job	Failed Steps	Tests
integration-tests	-     🔗	✅ 59  ❌ 0  ⏭ 0    🔗	See Details
setup-environment	-     🔗	N/A	See Details
check-collector-module-version	-     🔗	N/A	See Details
check-codeowners	-     🔗	N/A	See Details
checks	-     🔗	N/A	See Details
lint-matrix (receiver-0)	-     🔗	N/A	See Details
lint-matrix (receiver-1)	-     🔗	N/A	See Details
lint-matrix (processor)	-     🔗	N/A	See Details
lint-matrix (exporter)	-     🔗	N/A	See Details
lint-matrix (extension)	-     🔗	N/A	See Details
lint-matrix (internal)	-     🔗	N/A	See Details
lint-matrix (other)	-     🔗	N/A	See Details
correctness-traces	-     🔗	N/A	See Details
build-examples	-     🔗	N/A	See Details
unittest-matrix (1.19, receiver-0)	-     🔗	N/A	See Details
unittest-matrix (1.19, receiver-1)	-     🔗	N/A	See Details
unittest-matrix (1.19, processor)	-     🔗	N/A	See Details
unittest-matrix (1.19, exporter)	-     🔗	N/A	See Details
unittest-matrix (1.19, extension)	-     🔗	N/A	See Details
unittest-matrix (1.19, internal)	-     🔗	N/A	See Details
unittest-matrix (1.19, other)	-     🔗	N/A	See Details
unittest-matrix (1.18, receiver-0)	-     🔗	N/A	See Details
unittest-matrix (1.18, receiver-1)	-     🔗	N/A	See Details
unittest-matrix (1.18, processor)	-     🔗	N/A	See Details
unittest-matrix (1.18, exporter)	-     🔗	N/A	See Details
unittest-matrix (1.18, extension)	-     🔗	N/A	See Details
unittest-matrix (1.18, internal)	-     🔗	N/A	See Details
unittest-matrix (1.18, other)	-     🔗	N/A	See Details
correctness-metrics	-     🔗	N/A	See Details
lint	-     🔗	N/A	See Details
unittest (1.19)	-     🔗	N/A	See Details
unittest (1.18)	-     🔗	N/A	See Details
cross-compile (darwin, amd64)	-     🔗	N/A	See Details
cross-compile (darwin, arm64)	-     🔗	N/A	See Details
cross-compile (linux, 386)	-     🔗	N/A	See Details
cross-compile (linux, amd64)	-     🔗	N/A	See Details
cross-compile (linux, arm)	-     🔗	N/A	See Details
cross-compile (linux, arm64)	-     🔗	N/A	See Details
cross-compile (linux, ppc64le)	-     🔗	N/A	See Details
cross-compile (windows, 386)	-     🔗	N/A	See Details
cross-compile (windows, amd64)	-     🔗	N/A	See Details
build-package (deb)	-     🔗	N/A	See Details
build-package (rpm)	-     🔗	N/A	See Details
windows-msi	-     🔗	N/A	See Details
publish-check	-     🔗	N/A	See Details
publish-dev	-     🔗	N/A	See Details
publish-stable	-     🔗	N/A	See Details

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