[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]

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Pinging code owners:

• receiver/hostmetrics: @dmitryax @braydonk

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

[rogercoll]

We can have additional information about the read/write characters for the process as well.

@ishleenk17 Do you have any example of how these new metrics would look like? I think we will need to add them into SemConv first