Review units of telemetry in metadata.yaml telemetry

[crobert-1]

Component(s)

No response

Describe the issue you're reporting

This is the contrib equivalent issue for https://github.com/open-telemetry/opentelemetry-collector/issues/10556

Many metrics defined in components' metadata.yaml files have the unit of 1. This isn't meaningful or helpful to users. These metrics should be reviewed to determine a more informative unit.

Here's the list of components that currently have at least one metric with the unit of 1:

• [ ] connector/grafanacloudconnector
• [ ] connector/servicegraphconnector
• [ ] exporter/lokiexporter
• [ ] exporter/prometheusremotewriteexporter
• [ ] exporter/sumologicexporter
• [ ] pkg/stanza/fileconsumer
• [ ] processor/filterprocessor
• [ ] processor/groupbyattrsprocessor
• [ ] processor/groupbytraceprocessor - https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/34167
• [ ] processor/k8sattributesprocessor
• [ ] processor/probabilisticsamplerprocessor
• [ ] receiver/bigipreceiver
• [ ] receiver/dockerstatsreceiver
• [ ] receiver/elasticsearchreceiver
• [ ] receiver/expvarreceiver
• [ ] receiver/fluentforwardreceiver
• [ ] receiver/hostmetricsreceiver/internal/scraper/cpuscraper
• [ ] receiver/hostmetricsreceiver/internal/scraper/filesystemscraper
• [ ] receiver/hostmetricsreceiver/internal/scraper/memoryscraper
• [ ] receiver/hostmetricsreceiver/internal/scraper/pagingscraper
• [ ] receiver/hostmetricsreceiver/internal/scraper/processscraper
• [ ] receiver/httpcheckreceiver
• [ ] receiver/kafkametricsreceiver
• [ ] receiver/kafkareceiver
• [ ] receiver/kubeletstatsreceiver
• [ ] receiver/mongodbatlasreceiver
• [ ] receiver/mongodbreceiver
• [ ] receiver/mysqlreceiver
• [ ] receiver/oracledbreceiver
• [ ] receiver/otelarrowreceiver
• [ ] receiver/podmanreceiver
• [ ] receiver/postgresqlreceiver
• [ ] receiver/redisreceiver
• [ ] receiver/snmpreceiver
• [ ] receiver/snowflakereceiver
• [ ] receiver/solacereceiver
• [ ] receiver/sshcheckreceiver
• [ ] receiver/statsdreceiver
• [ ] receiver/zookeeperreceiver

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