[Hostmetrics Receiver] Add read and write character values to the process scraper

[ishleenk17]

Component(s)

HostMetrics Receiver

Describe the issue you're reporting

The Process scrapper currently captures the read/write bytes information for the process scraper.
We can have additional information about the read/write characters for the process as well.

[github-actions]

Pinging code owners for receiver/hostmetrics: @dmitryax @braydonk. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• receiver/hostmetrics: @dmitryax @braydonk

See Adding Labels via Comments if you do not have permissions to add labels yourself.